Geometry and Trigonometry practice question

Answer: A. 14π

Circumference = π × diameter = 14π. (Or 2πr with r = 7.)

Why the other answers are wrong

B. 7π

7π uses the radius in place of the diameter; C = 2πr = 14π.

C. 28π

28π doubles the diameter, as if 14 were the radius.

D. 49π

49π is πr², the AREA of the circle.

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