Question

The formula for the circumference of a circle is C =2 pi r.
Find the circumference of a
circle with a radius of 2 cm.
A. 12.56 cm
B. 12.56 cm^2
C. 6.28 cm
D. 6.28 cm^2
E. 12.00 cm

Answer 1

The given radius is 2 cm.

Therefore the circumference of the circle is
2π*(2 cm) = 4π cm.
From the calculator, obtain
4π = 12.56

Answer: A. 12.56 cm