Guys tolong bantu Yoo

Guys tolong bantu Yoo

*sudut AOC=2×60

=120 derajat

$l.juring : oac = frac{120}{360 } times pi {r}^{2} \ = frac{1}{3} times frac{22}{7} times {(21cm)}^{2} \ = frac{1}{3} times 1386 \ = 462 {cm}^{2}$