Question

A rectangular paperboard measuring 21 in long and 13 in wide has a semicircle cut out of it, as shown below. What is the perimeter of the paperboard that remains after the semicircle is removed? (Use the value 3.14 for n, and do not round your answer. Be sure to include the correct unit in your answer.

Answer 1

The perimeter of the figure is:

`P=13in+21in+21in+(13in\cdot\pi)/(2).`

Using π=3.14 we get:

`P=75.41in\text{.}`

Answer: 75.41 in.