Using , find the approximate area of a circle with a diameter of length 7 inches.
A)19.25
B)38.5
C)77
D)154

Question

Using        , find the approximate area of a circle with a diameter of length 7 inches.
A)19.25 
B)38.5 
C)77 
D)154

Quizplus · Accepted Answer

The diameter of the circle is 7 inches. We need to find the radius of the circle to calculate the area. 
The radius is half of the diameter which is 7/2 = 3.5 inches.
The formula for the area of a circle is A = πr^2, where π is approximately 3.14. 
Substituting the radius, we get A = 3.14 x 3.5^2 = 38.465
Rounding off to the nearest whole number, we get the approximate area of the circle to be 38 square inches. Therefore the best choice is B.

Using , Find the Approximate