Question

Question #0262a

Answer 1

Circumference = 219.91 cm
Area = `3848.45 cm^2`

Explanation:

The circumference of a circle can be obtained by using the equation below:

where the mathematical constant, `pi`, has a value of approximately 3.14 and `r` represents the radius of the circle.

All we have to do is multiply the given diameter by `pi` to determine C:

`"Circumference" = 70cm xx pi`
`"Circumference" = 219.91 cm`

The area can be computed by using the following equation:

This equation requires that we have a radius instead of a diameter, but that's no problem since the radius is half of the diameter. Therefore, the radius is `1/2(70cm)` or just 35 cm.

The area is: `pixx(35cm)^2` = `3,848.45cm^2`