Question

the quilt pattern includes 32 small triangles. Each has a base of 3 in and a height of 1.5 in. Find the amount of fabric used to make 32 triangles.

Answer 1

The area of a triangle with base b and height h is

$\dfrac{bh}{2}$

So, the area of 32 triangles with base 3 and height 1.5 is

$\dfrac{3\cdot 1.5}{2}\cdot 32 = 3\cdot 1.5\cdot 16 = 72$

So, 72 squared inches of fabric were used.