Common Core Math Vocabulary

Equilateral Triangle - Definition with Examples

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What is an equilateral triangle? 
In geometry, an equilateral triangle is a triangle whose all three sides are of equal length.

Equilateral Triangle

The sides of an equilateral triangle are congruent.

Equilateral Triangle all side equal congruent

We can find the shape of a triangle in a rack in billiards, a road side sign board and a slice of pizza, around us. 

Equilateral Triangles around us real life examples

  Fun Facts

  • All angles of an equilateral triangle measure 60 degrees (60°).

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Sides of an equilateral triangle
Measure the same,
Like in a road side sign board
Or a rack of billiards game! 

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Instead of handing out math geometry worksheets on triangles, ask children to observe/spot things around them in which they can see equilateral triangles. 
You can also ask them to measure sides of various triangles they draw and find out if it is an equilateral triangle or not.

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