Question

The width of the tiled portion is 1.5 feet. What is the area of the tiled portion of the patio, rounded to the nearest whole square foot?

14 square feet

20 square feet

40 square feet

44 square feet

Answer 1

Visualize 2 areas, the whole semi- circle and the smaller unshaded one.

To find the area of the tiled portion, area of whole semi-circle - area of unshaded semi-circle.

pi* 5 ^2 - pi * (5- 1.5) ^2 = 78.54 - 38.48 = 40.06 approx 40 square feet.

Answer 2

It would be 40 for the WHOLE circle;
you only want HALF the circle so you would divide 40 by 2 = 20.

Therefore, the answer is 20 !