Question

What is the area of the triangular section ?

Answer 1

The answer is 72 square inches

Answer 2

First find the base and the height:
Base of the triangle is 36/4 = 9
Height of the triangle is 48/3 = 16

Second, find the area of the triangle:
A=1/2(16*9)
A=1/2(144)
A=72

The area of the shaded glass is 72 square inches.