What is the approximate distance around the half circle with a diameter of 64 meters? A. 100.48 m B. 200.96 m C. 401.92 m
D. 1607.68 m
2 answers:
Well, first you should know the formula for finding the full distance around a circle. The distance is also known as the circumference C:
C = 2<span>πr
where r is the radius which is half of the diameter. since we know the diameter, then we have enough information to solve for this:
</span>C = 2<span>π(64/2) m
C = 2</span><span>π(32) m
C = 64</span><span>π m
C </span><span>≈ 200.96 m
Now you might choose this as the answer, but the problem asks for half of the distance around the circle which is half of the circumference:
1/2C = 200.96/2
1/2C = 100.48
Thus the answer is A. 100.48.</span>
Your answer is A. 100.48 m I believe.
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