Hey ya'll, I really need help with some Math.

1. The diameter of a circle measures 10mm . What is the circumference of the circle?

2.The circumference of a circular painting is 62.8 feet. What is the radius of the painting? Use 3.14 for and do not round your answer.

1 answer

C=(3.14)x(Diameter) and
for the second one
C=(3.14)x(D) but when you find D you must divide it by 2 to get the radius (because the diameter is all the way across the circle and the radius starts at the center and goes to the outer edge (half way across the circle)).