Answer:

Circumference=226.08 mm

Radius =21 ft

Circumference =131.88

Radius= 4 cm

Circumference=25.12

Radius=90 m

Circumference= 565.2 m

Diameter=123m

Circumference=772.44m

Step-by-step explanation:

To get the circumference

Radius 2πr

• multiply the radius by 2 to get the diameter
• multiply the diameter to π(3.14)
• you got the answer

Diameter=πd

• multiply the diameter to π(3.14
• you got yhe answer