Question

Find the diameter of the circle with a circumference of 50mm. Round your answer to the nearest tenth

A) 16.0 mm
B) 26.4mm
C) 8.4mm
D) 33.5mm

Answer 1

the answer is A, to get it you’ll have to work backwards.

C = pi x d

so C divided by pi will get you the diameter

50 / pi = 15.91, rounded it should be 16.0 mm

Answer 2

A) 16.0 mm

Explanation:

Use the formula C=2 x pi x r

d=2 x r

Solve for d

d= C/pi = 50/pi = 15.91549

And it says to round to the nearest tenth, so the answer is A) 16.0mm