Question

what is the circumference of a circle with a diameter of 12 cm use 3.14 for r



Please help!

Answer 1

C = 2πr or πd

Since the diameter is given, we will use C = πd.

C = π×12

C = 37.68 cm

Answer 2

The answer is C = 37.68  or    C ≈ 37.7

Circumference of a circle is found by using 2πr:

π = 3.14

diameter = 12      so          radius = 12/2 = 6cm

2×3.14×6

= 6.28×6

= 37.68

≈ 37.7