Question

SOMEONE PLEASE HELP

Another way other than A=C2/4PI to find area when given circumference

Answer 1

Recall the formula for the area and circumference.
Area of a circle:
`\pi \cdot r^(2)`
Circumference of a circle:
`2\pi \cdot r`

Now, we can make
`\pi` the subject in the circumference and substitute that into the area.


`C = 2\pi r`

`(C)/(2r) = \pi`

Substitute it in place of
`\pi`.

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

`A = (C)/(2r) \cdot r^(2)`

`A = (C \cdot r)/(2)`