Question

A circular coaster has a diameter of 5 inches. What is it’s area? Write using pi. Show your work.

Answer 1

Diameter = 5in.

Radius = 5/2in.

Area of a circle

`= \pi {r}^(2)`

`= \pi * ( { (5)/(2)) }^(2)`

`= \pi * (25)/(4)`

`= (25)/(4) \pi`

`= 6.25\pi`

Answer 2

A= 19.625

Explanation:

A= πr²

A= (3.14) 2.5^2

A= 19.625