Question

CAN SOMEONE HELP PLEASE!!!

What is the circumference of a circle with a diameter of 21 cm? Approximate using pi equals 22 over 7.

7 cm
33 cm
66 cm
132 cm

Answer 1

The formula gives the circumference of a circle:

C = πd

Where d is the diameter of the circle.

Substituting the given values, we get:

C = (22/7) x 21 cm

C = 66 cm (approx)

Therefore, the circle's circumference with a diameter of 21 cm, approximated using π equals 22/7, is 66 cm.

So, the correct option is (C) 66 cm.