Question

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. ft2

Answer 1

Diameter = 21 ft
Radius = 21/2 ft

Area of a semi circle = πr^2 /2

= 3.14 x( 21/2 )^2/2
= 346.185/2
= 173.0925 ft^2

The answer is 173 ft^2

Answer 2

We know, Area of a Semi-circle = πr² / 2
Here, r = 21/2 = 10.5

So, A = 3.14 * (10.5)² / 2
A = 346.185 / 2
A = 173.09 Ft²

In short, Your Answer would be 173 Feet²

Hope this helps!