Question

What is the area of a circle with a diameter of 74 millimeters. Use pie

Answer 1

`4298.66mm^(2)`, or
`1369mm^(2)`
`\pi`

Explanation:

Use the formula for area of a circle

A =
`\pi`
`r^(2)`

the radius is half the diameter, so divide 74 by 2 then substitute it as r

A =
`\pi 37mm^(2)`

multiply 37 by 37

A =
`1369mm^(2) \pi`

multiple 1369 by pi(3.14)

`1369mm^(2) \pi` or
`4298.66mm^(2)`