Question

What did I do wrong when finding out the sector area? I know the answer I got is wrong so can someone please help me

Answer 1

I believe your mistake is that you are trying to use the sector area formula ti find arc length when there is already a formula for it.
The formula for it is

`2r\pi( (degree)/(360) )`
So first substitute the values in and then simplify!

`2(10.5)\pi( (118)/(360) )`
Now simplify!
21 × 118 is 2478 so it's

`(2478)/(360) \pi`
When divided ou and multiplied, this is 21.62cm!