Verified answer

To get the diameter, just double the radius that has been provided.

To get circumference the formula is 2πr.

To get the radius, half the diameter.

To get the diameter from the circumference just divide the circumference given by pi, I hope this made sense.

Formula:

Circumference = 2πr

Diameter = 2r

Radius = [tex]\frac{C}{2\pi }[/tex]

Answer:

1. Circumference = 21.99cm

Diameter = 7cm

2. Circumference = 43.98mm

Radius = 7 mm

3. Diameter = 18.99dm

Radius = 9.495dm

4. Circumference = 10.99557cm

Diameter = 3.5cm

5. Diameter = 24.98733mm

Radius = 12.49366mm