A circular stained glass

window has a diameter of 5

feet. What is the area, in

square feet, of the stained

glass window?

Answer: 19.6ft²

Step-by-step explanation:

Formula for finding the area of a circle = πr² where π = 3.142 or 22/7 and

r = 5/2 because two radii make one diameter.

Therefore the area of the circular stained glass = 3.142 x 5/2 x 5/2

= 3.142 x 25/4

= 19.638

≅ 19.6ft²