A rectangular stained glass window is made up of identical triangular parts as pictured below.

36 inches

48 inches

What is the area of the shaded triangular section?

Guest Feb 5, 2020

#1**+1 **

Note that the width of each rectangle = 48 / 3 = 16 in

And the height of each rectangle = 36 / 4 = 9 in

So.....the area of each of these rectangles = 16 * 9 = 144 in^2

And the shaded area is 1/2 of this = 72 in^2

CPhill Feb 5, 2020

#2**+2 **

The entire window is 48 x 36 = 1728 in^{2}

^{ made up of 24 triangles each triangle (which is shaded region) = 1728/24 = 72 in^2}

ElectricPavlov Feb 5, 2020