Find the area of a circle with a radius of 6 ft. Round off your answer to one decimal point. (The
formula for the area of a circle is A = π r2.)
A. 18.8 sq ft
B. 355.3 sq ft
C. 59.2 sq ft
D. 113.1 sq ft
Find the area of a circle with a radius of 6 ft. Round off your answer to one decimal point. (The
formula for the area of a circle is A = π r2.)
A. 18.8 sq ft
B. 355.3 sq ft
C. 59.2 sq ft
D. 113.1 sq ft
If you are doing this problem without a calculator, then you need to know that Π is rounded to 3.14 for practical purposes.
The formula for the area of a circle (A) is A =Πr^{2}.
r = 6 ft Π = 3.14,
A = 3.14 x 6^{2}
A = 113.04 (which is an estimated answer because Π is estimated in this case).
Therefore, the answer would be D. If you can use a calculator, then your answer will be more exact. Just realize that the estimate will put you close enough to your answer in a multiple choice setting if a calculator is not available.
A = 3.14 x 36
Given that the area, A, of a circle is defined by the following formula:
A = πr^{2} , where r is the radius of the circle ....
....then the area of a circle with a radius of 6 ft is as follows:
A = π(6)^{2} = π(36)
A = 36π = 113.09733552923
Thus, after rounding off the answer to one decimal point, the area of the circle is 113.1 ft^{2} (answer choice D).