Question

A circular plate has a dinameter of 9 inches. What is the area of the plate?

Answer 1

do you know the formula for the area of a circle ?

Answer 2

No

Answer 3

Do you have notes or a book? or google?

Answer 4

Yea

Answer 5

A=πr2

Answer 6

ok, but it is better to write it
A= πr^2 (the ^ shows the 2 is a power)
it means r*r

so do use this formula you need to know pi. it is (roughly) 3.14 or 22/7
any idea what r is ? i.e. what is the radius of your circle ?

Answer 7

diameter is 9
diameter is all the way across
the radius is ½ of that

Answer 8

81in

Answer 9

you want to find the radius. the radius is ½ of 9
or 9 divided by 2

that is 9/2 or 4.5 if you write it as a decimal

now do (22/7) * (9/2) * (9/2)
or do 3.14*4.5*4.5