I found the sector area but i cant find the triangle im so lost

[wooden locust]

Please help

[manic pagoda]

Did u get the angle of the sector?

U need to find the angle then use 1/2 x r^2 × sin the angle

To get the area of the triangle

[sour radish]

, rotate

[wooden locust]

Yeah i did

It was 180root3/pi

[wooden locust]

But how can i do sin of 180root3/pi

I was using that exact equation and got stuck

[manic pagoda]

Is this paper non calculator?

[wooden locust]

Yh

The question is non calc

[manic pagoda]

Oh I got no clue then

[sour radish]

Isn’t it in terms of r

[wooden locust]

No cus the r’s cancel out for the angle

Btw on the 4th line of working those weird shaped things are crossed out r’s