Triangle Shape for Kids: Sides, Corners and How to Draw It
A triangle is a flat shape with 3 straight sides and 3 corners. It has 3 straight sides and 3 corners. Below you will find its properties, how to draw it, where to spot it in real life, and a quick quiz.
A bright triangle for little learners to explore!
Triangle at a Glance
| Sides | 3 straight sides |
|---|---|
| Corners (vertices) | 3 |
| Angles | The three angles always add up to 180 degrees |
| Lines of symmetry | 3 for an equilateral triangle, 1 for an isosceles triangle, 0 for a scalene triangle |
| Flat or solid | Flat (2D) |
📐 What Makes a Triangle Special?
A triangle has 3 straight sides and 3 corners. There are different kinds: in an equilateral triangle all sides are equal, in an isosceles triangle two sides are equal, and in a right triangle one corner is a square corner. The three inside angles of any triangle always add up to 180 degrees. Triangles are very strong shapes, which is why builders use them in bridges and roofs.
🌟 Fun Facts about Triangle
- A triangle is the shape with the fewest possible straight sides — just 3!
- Triangles are super strong, so builders use them to support bridges and roofs.
- The three angles inside every triangle always add up to 180 degrees.
- A triangle is also a musical instrument you can ring like a bell!
How to Draw a Triangle
- Make three dots that are not in a straight line.
- Join the dots with three straight lines.
🔎 Where Can You Find a Triangle?
You can spot the triangle shape in everyday life, like a slice of pizza, a road yield sign, and a party hat. Try going on a shape hunt around your house or classroom — how many triangles can you find today?
Common Mix-Ups
Triangles can look very different: tall and thin, short and wide, or with all sides equal. Any shape with exactly 3 straight sides is a triangle.
Quick Quiz: The Triangle
Answer each question, then tap it to check.
How many sides does a triangle have?
Three.
What do the angles in a triangle add up to?
180 degrees.
What is a triangle with all three sides the same length called?
An equilateral triangle.
Printable Practice
Practice on paper with the Shapes Tracing and Coloring worksheet and the Shapes Activity worksheet, or play the Shapes Match game.
🏫 Classroom Activity: Shape Hunt & Matching
Send children on a hunt for triangular objects — a party hat, a slice of pizza, a road sign picture — and gather the finds on a table. Then play a matching game: draw several shapes on cards and have kids sort out only the triangles.
🏠 Homeschool Activity
Fold a square piece of paper diagonally to make a triangle, then unfold and refold it a few times, talking about the three straight sides that form. It's a simple, tactile way to build a triangle from a shape kids already know.
🔬 STEM Connection
Build a small triangle out of craft sticks or straws, then try pushing on its corners — it holds its shape! Compare it to a four-sided square frame, which wobbles more easily, to show why triangles are used in bridges and towers.
Frequently Asked Questions
How many sides does a triangle have?
A triangle has 3 straight sides.
How many corners does a triangle have?
A triangle has 3 corners.
How many lines of symmetry does a triangle have?
3 for an equilateral triangle, 1 for an isosceles triangle, 0 for a scalene triangle.
How do you draw a triangle?
Make three dots that are not in a straight line. Join the dots with three straight lines.
What is a common mistake when learning the triangle?
Triangles can look very different: tall and thin, short and wide, or with all sides equal. Any shape with exactly 3 straight sides is a triangle.
Summary
A triangle is a flat shape with 3 straight sides and 3 corners. Remember: 3 straight sides, 3 corners. Next, learn about the rectangle, or see all shapes.