Question

An umbrella is made by stitching 12 triangular pieces of cloth, each measuring (50 cm × 20 cm × 50 cm). Find the area of the cloth used in it.

Answer 1

Consider a = 50 cm, b = 20 cm and c = 50 cm

So we get

So the area of one piece of cloth = 490 cm²

We know that the area of 12 pieces = 12 (490)

By multiplication

The area of 12 pieces = 5880 cm²

Therefore, the area of cloth used in it is 5880 cm².