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Find the exact circumference of a circle with the given radius. 3½ cm C = A.7.5 cm B.7 cm C.6.25 cm
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5 votes
Find the exact circumference of a circle with the given radius.

3½ cm

C =

A.7.5 cm
B.7 cm
C.6.25 cm

User Eastsun
by
8.0k points

2 Answers

2 votes
I don't see an answer choice for this question. The equation for circumference is 2
\pir
You should get 2pi(3.5)=21.99
User Nimer Awad
by
9.3k points
4 votes
None of the answers are "exact" if you use 3.14 for pi.

That 3.14 is an approx. to pi.

If you want an exact answer, include "pi" in your answer, not a numerical value:

C = 2pi*r becomes C = 2pi(3.5 cm) = 7pi cm, or 7
\pi cm

User Hamid Mosalla
by
7.9k points
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