Cute Geometry – Area of a Triangle

Hello! Cute geometry is here again.

And today’s topic is triangle. The most simple closed shape in geometry. It consists of 3 sides and 3 angles.

Last week we let our bunny tell us the area of a circle. This week our bunny will tell us how to compute the area of a triangle. People discovered the properties of triangles in ancient times. Images of triangles are encountered in many papyri found in ancient Greece and ancient Egypt.

Depending on how many angles or sides are equal there are special different names given to triangles: scalene, equilateral and isosceles. For instance, an equilateral triangle has 3 equal sides and angles, always 60°.

Look at this cute picture below. You can see that lengths of all 3 sides of bunny-shaped triangle are absolutely the same.

How to compute the area of a equilateral triangle? Easy! Use following formula:

Where:

S — is the area of the triangle;

a — is the length of a side of the triangle.

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