Question

Need help please on geometry

Answer 1

the area of a circle is:

A = pi*r^2

given:
d = 10inches
r = 10/2 inches = 5inches

so the are of the given circle is

A = pi*5^2 = 25pi in.sq

Convert inches to cm;

25pi in.sq ( 127cm / 50 inches )^2 = 161.29pi cm.sq

Answer 2

To solve this we are going to use the formula for the area of a circle:
`A= (1)/(4) \pi d^2`
where

`A` is the area of the circle

`d` is the diameter of the circle

We know from our problem that the area of our circle is 10 inches long, so
`d=10in`. Lets replace that value in our formula to find
`A`:

`A=(1)/(4) \pi (10in)^2`

`A=78.54in^2`

We can conclude that the correct answer is: 78.54 square inches, or in centimeters: 506.7 square cm.