The triangle sign symbol is one of the most recognized shapes in the world. You see it on road signs, on a car dashboard, on a video player, in a math equation and in a physics formula. Depending on where it appears, it can mean danger, change, direction, play or stability.
This guide explains what each triangle symbol means, where it is used and how to type it on Windows, Mac, iPhone, Android, Word and LaTeX. You can copy every symbol from the lists below, so you do not need to search for shortcuts.
Quick Copy and Paste: Triangle Sign Symbol List
Select a symbol, copy it with Ctrl+C (Cmd+C on Mac) and paste it anywhere.
Up pointing: ▲ △ ▴ ▵ 🔺 🔼 ⏫ ◬
Down pointing: ▼ ▽ ▾ ▿ 🔻 🔽 ⏬
Right pointing: ▶ ▷ ▸ ▹ ► ⏵ ▶️
Left pointing: ◀ ◁ ◂ ◃ ◄ ⏴
Corner triangles: ◢ ◣ ◤ ◥
Math and science triangles: Δ ∆ ∇ ⊿ ∴ ∵
Warning triangle: ⚠ ⚠️
Read Also This Blog: Square Sign Symbol
Triangle Sign Symbol Meaning
A triangle has three sides and three corners. It is the strongest and simplest closed shape, which is why people link it with stability, direction and energy. One point at the top also draws the eye upward, while a point facing down suggests dropping or stopping.
Here are the main meanings you will run into.
- Warning and caution: A triangle around an exclamation mark tells you to pay attention.
- Change or difference: In math and science, the Greek letter delta (Δ) means “change in.”
- Direction: Arrows and pointers use triangles to show up, down, left or right.
- Play and forward: The right pointing triangle ▶ is the universal play button.
- Strength and balance: Pyramids and truss bridges rely on triangles to hold weight.
- The number three: Three sides, three angles, three parts of a whole, such as the Trinity or mind, body and spirit.
- Fire, water, air and earth: Old alchemy used differently drawn triangles for the four elements.
- Increase and decrease: ▲ often shows a rise in price or rank, and ▼ shows a fall.
15+ Triangle Sign Symbol Meanings at a Glance
| # | Symbol | Name | Common Meaning |
|---|---|---|---|
| 1 | ▲ | Black Up Pointing Triangle | Up, increase, higher rank |
| 2 | △ | White Up Pointing Triangle | Triangle in geometry, a change, a mountain |
| 3 | ▼ | Black Down Pointing Triangle | Down, decrease, dropdown menu |
| 4 | ▽ | White Down Pointing Triangle | Nabla shape, water in alchemy |
| 5 | ▶ | Right Pointing Triangle | Play, next, forward |
| 6 | ◀ | Left Pointing Triangle | Back, previous, rewind |
| 7 | ▷ | White Right Pointing Triangle | Outlined play or a normal subgroup |
| 8 | ► | Right Pointing Pointer | A cursor or list marker |
| 9 | ▸ | Small Right Triangle | A collapsed menu or sub item |
| 10 | ◢ | Black Lower Right Triangle | A corner, a design accent |
| 11 | Δ | Greek Capital Delta | Change or difference |
| 12 | ∇ | Nabla | Gradient, divergence, curl |
| 13 | ⊿ | Right Triangle | A right angled triangle in math |
| 14 | ∴ | Therefore | A conclusion in logic |
| 15 | ∵ | Because | A reason in logic |
| 16 | ⚠ | Warning Sign | Caution or hazard |
| 17 | 🔺 | Red Triangle Pointed Up | Attention, increase, highlight |
| 18 | 🔻 | Red Triangle Pointed Down | Decrease, a pointer, yield |
Triangle Sign Symbol Text: Unicode Details
Every triangle symbol is a Unicode character. Unicode is the shared standard that lets different devices show the same symbol. Most triangles sit in the Geometric Shapes block, from U+25A0 to U+25FF. In Unicode, “black” means filled and “white” means outlined.
| Symbol | Unicode | HTML Code | CSS Code |
|---|---|---|---|
| ▲ | U+25B2 | ▲ | \25B2 |
| △ | U+25B3 | △ | \25B3 |
| ▼ | U+25BC | ▼ | \25BC |
| ▽ | U+25BD | ▽ | \25BD |
| ▶ | U+25B6 | ▶ | \25B6 |
| ◀ | U+25C0 | ◀ | \25C0 |
| Δ | U+0394 | Δ | \0394 |
| ∇ | U+2207 | ∇ | \2207 |
| ∴ | U+2234 | ∴ | \2234 |
| ⚠ | U+26A0 | ⚠ | \26A0 |
Web designers use these codes so a symbol still shows even when a font is missing. If you only need the symbol in a message or post, copying it is faster.
Upside Down Triangle Sign Symbol
The upside down triangle points down. The most common versions are ▼, ▽, 🔻 and 🔽.
What it can mean:
- Down or decrease: Stock apps and dashboards use ▼ for a drop in value.
- Dropdown menu: A small ▾ beside a label tells you a list will open.
- Yield or give way: On many road signs, an inverted triangle means slow down and let others pass.
- Nabla: In math and physics, ∇ is an upside down triangle used for vector operations.
- Water: In alchemy, a downward triangle stands for water.
- Feminine symbolism: Some traditions link it with the chalice or the womb.
The right meaning depends on context, so look at what surrounds the triangle.
Right Pointing Triangle Sign Symbol
The right pointing triangle is most famous as the play button. You will see ▶ on video players, music apps, streaming services and voice recorders.
Other common uses:
- Next or forward: It points toward what comes next.
- Expand menu: A small ▸ can show a folder or menu that you can open.
- List marker: ► or ▸ often starts a bullet line.
- Pointer: It draws attention to a line of text.
- Subgroup in math: ▷ and ⊳ appear in group theory.
The left pointing twin, ◀, does the opposite. It means back, previous or rewind.
Red Triangle Sign Symbol Meaning
A red triangle is a strong alert. It tells you to stop, look or take action.
| Where You See It | Meaning |
|---|---|
| Car hazard light button | Turns on your emergency flashers |
| Warning triangle on the road | Placed behind a broken down car to warn traffic |
| Red dashboard triangle with an exclamation mark | A serious problem that needs prompt attention |
| Road sign with a red border | A warning or a give way rule |
| 🔺 and 🔻 emojis | Attention, a rise or fall, or a pointer to something |
In financial charts, the color can flip by region. In many Western markets red means a drop, while in parts of East Asia red means a rise. Always check the legend.
A note on care: the inverted red triangle 🔻 has a dark history and current use in some propaganda videos, so think about the audience before using it as a decoration.
Yellow Triangle Sign Symbol Meaning
A yellow or amber triangle is a softer warning. It says “be careful” rather than “stop right now.”
- Dashboard light: A yellow triangle with an exclamation mark is a general warning. Your car may be flagging low fluid, a sensor issue or a system fault. Check the message on the display.
- Caution signs: Yellow with black markings is a global choice for hazards, such as a wet floor sign.
- App alerts: Software uses ⚠ to say something needs review before you continue.
- Electrical and chemical hazard labels: A yellow triangle signals a potential danger.
A yellow triangle is usually a heads up, while a red one demands action.
Triangle Symbol Road Sign
Road signs use triangles in two main ways, and the rules differ by region.
Vienna Convention countries (most of Europe, Asia and Africa)
- A triangle pointing up with a red border is a warning sign. It may show a curve, a slippery road, children crossing or roadworks.
- A triangle pointing down with a red border means give way.
United States and Canada
- Yield signs are inverted triangles with a red border.
- Warning signs are usually yellow diamonds instead of triangles.
| Road Sign | Meaning |
|---|---|
| Up pointing triangle, red border | Danger ahead |
| Down pointing triangle, red border | Give way |
| Triangle with an exclamation mark | Other danger |
| Triangle with a bend arrow | Curve ahead |
| Triangle with a falling rock | Falling rocks |
The triangle is used because its sharp corners are easy to spot from a distance, even in poor weather.
Triangle Sign Symbol on Keyboard
There is no triangle key, but you have several fast options.
Windows Alt codes
Turn on Num Lock, hold Alt and type the number on the numeric keypad.
| Symbol | Shortcut |
|---|---|
| ▲ | Alt + 30 |
| ▼ | Alt + 31 |
| ► | Alt + 16 |
| ◄ | Alt + 17 |
| Δ | Alt + 916 |
You can also press the Windows key and the period key to open the emoji panel, then search “triangle.” The Character Map app also lets you pick a symbol and copy it.
Mac
- Press Option + J for the increment sign ∆, which looks like a delta.
- Press Control + Command + Space to open the Character Viewer, then search “triangle” or “delta.”
- Use Edit, then Emoji and Symbols, in many apps.
iPhone
- Tap the emoji key and choose 🔺, 🔻, 🔼, 🔽, ▶️, ◀️ or ⚠️.
- For plain text triangles such as ▲ or Δ, copy them from this page.
- Save a shortcut under Settings, General, Keyboard, Text Replacement so a short word like “tri” gives you ▲.
Android
- Open the keyboard and tap the symbols key.
- Check the extra symbols page for shapes, since many keyboards include a few triangles.
- Use the emoji tab for 🔺 🔻 ▶️ and ⚠️.
Gboard also lets you type “triangle” into the emoji search bar.
Triangle Sign Symbol in Word
Word gives you several easy ways to insert a triangle.
Insert Symbol
- Click Insert, then Symbol, then More Symbols.
- Choose the Geometric Shapes subset.
- Pick your triangle and click Insert.
Alt plus X
- Type 25B2 for ▲, or 0394 for Δ.
- Press Alt + X right away. The code turns into the symbol.
Symbol font shortcut
Press Ctrl + Shift + Q, type the capital letter D, then press Ctrl + Shift + Q again to switch back. You will get Δ.
Draw a shape
Go to Insert, Shapes, and choose Isosceles Triangle or Right Triangle. Hold Shift while dragging to keep the proportions neat.
Equation editor
Press Alt + = to open an equation, then type \Delta or \nabla and press the spacebar.
Triangle Symbol in Math
Math uses triangles in several important ways.
- A triangle shape: △ABC means triangle ABC. Its three angles add up to 180 degrees.
- Area: One half times base times height.
- Right triangle: The Pythagorean theorem says a² + b² = c².
- Congruent and similar: Triangles with the same shape and size are congruent. Triangles with the same shape but different size are similar.
- Delta (Δ): It means change. Δx is the change in x, which equals the final value minus the starting value.
- Discriminant: In algebra, the discriminant of a quadratic is often written Δ.
- Nabla (∇): It stands for the gradient in vector calculus.
- Laplacian: Written as ∇² or Δ, it measures how a field spreads.
- Therefore and because (∴ and ∵): Three dots in a triangle shape help write proofs.
- Triangle notation for symmetry: In some fields, ▷ and ⊲ show normal subgroups.
Trigonometry, with sine, cosine and tangent, also began as the study of triangles.
Triangle Symbol in Physics
In physics, the triangle is nearly always the delta, and it means “change in.”
| Symbol | Meaning | Example |
|---|---|---|
| Δx | Change in position, or displacement | Moving from 2 m to 10 m gives Δx of 8 m |
| Δt | Change in time | The time between two events |
| Δv | Change in velocity | Used to find acceleration |
| ΔT | Change in temperature | Heat transfer problems |
| ΔE | Change in energy | Energy conservation |
| Δp | Change in momentum | Impulse and collisions |
| ΔG, ΔH | Change in free energy or enthalpy | Chemistry and thermodynamics |
| ∇ | Del operator | Gradient, divergence and curl in fields |
Average acceleration is written as Δv divided by Δt. The uncertainty principle also uses delta, with Δx and Δp showing the spread in position and momentum. In rocket science, delta v tells you how much a spacecraft can change its speed.
In chemistry, a triangle above a reaction arrow means “add heat.”
Triangle Sign Symbol in LaTeX
LaTeX has ready commands for most triangles. Load the amssymb package for the filled versions.
| Symbol | Command | Notes |
|---|---|---|
| △ | \triangle | Triangle |
| △ | \bigtriangleup | Larger up triangle |
| ▽ | \bigtriangledown | Larger down triangle |
| ▲ | \blacktriangle | Needs amssymb |
| ▼ | \blacktriangledown | Needs amssymb |
| ◁ | \triangleleft | Left triangle |
| ▷ | \triangleright | Right triangle |
| ◀ | \blacktriangleleft | Needs amssymb |
| ▶ | \blacktriangleright | Needs amssymb |
| Δ | \Delta | Capital delta |
| ∇ | \nabla | Nabla |
| ∴ | \therefore | Needs amssymb |
| ∵ | \because | Needs amssymb |
Use these inside math mode, between dollar signs or in an equation block.
Triangle Sign Symbol in Design and User Interfaces
Designers use triangles constantly because they carry direction with almost no effort.
- Play and pause controls: ▶ starts media and ⏵ appears in many toolbars.
- Dropdowns: ▼ or ▾ shows a list can open.
- Sort arrows: ▲ sorts from low to high, and ▼ sorts from high to low.
- Tree views: ▸ means collapsed and ▾ means expanded.
- Tooltips and speech bubbles: A small triangle points at the target.
- Logos: Triangles suggest movement, ambition and precision.
- Corner accents: ◢ and ◣ create diagonal cuts in layouts.
Use ▴ and ▾ for compact spaces, because they are smaller and sit well inside text.
Triangle Sign Symbol in Culture and Symbolism
The triangle has a long history well beyond screens.
- Egyptian pyramids: Triangular faces link the earth to the sky.
- Christianity: The triangle often illustrates the Trinity.
- Alchemy: △ means fire, ▽ means water, and lines through them mean air and earth.
- Eye of Providence: An eye inside a triangle appears on many old seals and on the US one dollar bill.
- The Deathly Hallows and the Triforce: Popular fiction uses triangles to suggest power and unity.
- Pink triangle: Once used to mark people in Nazi camps, it later became a symbol of LGBTQ remembrance and pride.
- Delta: The fourth letter of the Greek alphabet also names the shape of a river mouth.
Tips for Using Triangle Symbols Well
- Choose the right direction. Up means rise, down means drop, right means play or next.
- Check your audience. Colors and shapes can mean different things in different countries.
- Test on multiple devices. Emoji triangles look different on iPhone, Android and Windows.
- Do not replace real letters. Δ is not the letter A, and search engines treat them differently.
- Add a text label for accessibility. Screen readers may skip symbols, so name what they mean.
- Do not overuse them. A few well placed triangles guide the eye, while too many create clutter.
Frequently Asked Questions
What is the triangle sign symbol?
It is a three sided shape, such as ▲ or △, used to show direction, change, warning or play.
How do I type a triangle sign symbol on my keyboard?
On Windows, hold Alt and type 30 on the numpad for ▲. On a Mac, open the Character Viewer with Control + Command + Space.
How do I copy and paste the triangle sign symbol?
Highlight the symbol above, press Ctrl+C or Cmd+C, then paste it with Ctrl+V or Cmd+V.
What does the upside down triangle sign symbol mean?
It usually means down, decrease or give way. In math, ∇ is called nabla.
What does the right pointing triangle sign symbol mean?
▶ means play, forward or next. It is the standard media button.
What does a red triangle sign symbol mean?
It signals danger or an urgent alert, such as hazard lights or a warning on your dashboard.
What does a yellow triangle sign symbol mean?
It is a caution message. Something needs your attention, but it is not always an emergency.
What does a triangle sign symbol on a road sign mean?
An upward triangle with a red border warns of a hazard, and a downward one means give way.
What does the triangle sign symbol mean in math?
△ means a triangle, and Δ usually means change or difference.
What does the triangle sign symbol mean in physics?
Δ means change in a quantity, such as Δt for time or Δv for velocity.
How do I insert a triangle sign symbol in Word?
Go to Insert, Symbol, More Symbols and choose Geometric Shapes. You can also type 25B2 and press Alt + X.
How do I write a triangle sign symbol in LaTeX?
Use \triangle for △, \blacktriangle for ▲ and \Delta for Δ.
What is the difference between Δ and △?
Δ is the Greek letter delta, used as a variable or operator. △ is a geometric triangle shape.
What does the triangle sign symbol with an exclamation mark mean?
It means warning or caution. Check the message near it to learn what needs attention.
Conclusion
The triangle sign symbol is small but full of meaning. It can point the way, mark a hazard, show change in a formula or start your favorite video. Once you know the Unicode name and shortcut for each version, you can use the right one on any device.
Bookmark this page and return to the copy and paste lists whenever you need a quick triangle. If a symbol shows as an empty box on your screen, switch fonts or use the emoji version instead.
