Question

What is the area of a circle with a diameter of 11 cm?

Answer 1

`(121)/(4) \pi cm^2` or
`30.25\pi cm^2`

Explanation:

1. Convert diameter to radius.

`r=(1)/(2) d`

`r=(1)/(2) (11)`

`r=(11)/(2)`

2. Find area of a circle.

`A=r^2\pi`

`A=((11)/(2))^2\pi`

`A=(121)/(4) \pi=30.25\pi`

(If π ≈ 3.14, multiply 3.14 to decimal)

Answer 2

95.03 square cm

I hope this helps you and let me know if it was correct.