Question

A circle has a diameter of 22 cm. What is its circumference?

Answer 1

Answer:

$\boxed {\tt 69.08 \ centimeters}$

Step-by-step explanation:

The circumference of a circle can be found using the following formula:

$c= \pi d$

where d is the diameter. We know the diameter of the circle is 22 centimeters. Substitute the value in for d.

$d= 22 \ cm$

$c= \pi* 22 \ cm$

We also know we are using 3.14 for pi. Substitute it in for pi.

$c= 3.14 * 22 \ cm$

Multiply.

$c=69.08 \ cm$

The circumference of the circle is 69.08 centimeters.

Answer 2

Answer:

Circumference = 69.08 cm

Step-by-step explanation:

Diameter = 22

Radius = 22/2

= 11

Circumference = 2πr

= 2 × 3.14 × 11

= 69.08 cm

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