SOLUTION: Find the exact circumference in inches and area in square inches of a circle whose diameter has length 16 in

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Question 1194245: Find the exact circumference in inches and area in square inches of a circle whose diameter has length 16 in
Answer by math_tutor2020(3816) About Me  (Show Source):
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Answers:
Exact circumference = 16pi inches
Exact area = 64pi square inches

Work Shown for the circumference
d = 16 = diameter
C+=+pi%2Ad
C+=+pi%2A16
C+=+16pi

Work Shown for the area
d = 16 = diameter
r = d/2 = 16/2 = 8 = radius
A+=+pi%2Ar%5E2
A+=+pi%2A8%5E2
A+=+pi%2A64
A+=+64pi

Those results are exact in terms of pi.
To get approximate versions of each, replace pi with something like 3.14; use more decimal places of pi to get better accuracy.