mohon banttuannya soalnya udah mau masuk.. plies

L persegi panjang
= p x l
= 18 x 10
= 180cm²

d = 10
r = 10/2 = 5cm

L lingkaran
= phi r²
= 3,14 x 5²
= 3,14 x 25
= 78,5cm²

L arsir
= 180 - 78,5
= 101,5 cm²