Question

If the diameter is 20 cm what is the area based on pi

Answer 1

`\Large \boxed{\mathrm{100\pi \ cm^2 }}`

Explanation:

`\displaystyle area \ of \ circle \ = \ \pi ((diameter)/(2) )^2`

`\displaystyle A \ = \ \pi ( (20)/(2) )^2`

`\displaystyle A \ = \ \pi ( 10 )^2`

`\displaystyle A \ = \ 100\pi`