Question

The diameter of a circle is 4 cm. Which equation can be used to find its circumference?

c = π x 2,

c = π x 4,

c = π x 4/2,

c = π x 4/4

Help meh plz

Answer 1

C= pie times r squared

Answer 2

the second one

Explanation:

the second one because if the diameter is half which is ×2 than the full circumference is ×4