A patio in the shape of a semicircle has a diameter of 21 ft.

What is the approximate area of the patio, rounded to the nearest square foot?

Use 3.14 to approximate pi star times.

The answer is 173 ft²

The area of the patio (A) is half of the area of the circle (A1) with a diameter of 21 ft:

A = A1/2

The area of the circle with radius r is:

A1 = π * r²

π = 3.14

We do not have the radius, but we know that it is a half of the diameter:

r = 21 ft / 2 = 10.5 ft

A1 = 3.14 * (10.5) ² = 346.18 ft²

So, the area of the patio is:

A = A1/2

A = 346.18 ft² / 2

A = 173.09 ft² ≈ 173 ft²