Perimeter and area of triangles

Learn how to calculate the perimeter and the area of isosceles, equilateral and scalene triangles!

Notes

Do you remember all the types of triangles?

Learn how to calculate the perimeter and the area of isosceles, equilateral and scalene triangles!

Table of contents of this lesson: Perimeter and area of triangles

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Area of triangle

A triangle has just three sides! How can you find its area?

Take two triangles and put them one next to the other. What do you see? A parallelogram! It has two pairs of parallel sides and the base corresponds to the base of the triangle.

Draw the height of the triangle and use the same formula to find the area of a parallelogram. But don't forget to divide everything by 2!

A = [b x h] : 2

 

Perimeter of a triangle

Perimeter of a triangle