Geometry and Trigonometry practice question

Answer: 5

Circumference = 2πr, so 2r = 10 and r = 5.

Common wrong answers

If you answered 10

10 is 2r (the diameter); halve it for the radius.

If you answered 20

Divide 10π by 2π rather than multiplying.

If you answered 25

25 is r² if the AREA were 25π; circumference divides by 2π instead.

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