tolong dijawab yaa soalnya mau di kumpulin besok

1.
L.ABO = 3,14 × 20 × 20 × 72/360
= 1.256 × 1/5
= 251,2 cm^2


2.
6,28 = 2 × 3,14 × 5 × y/360
6,26 = 31,4 × y/360
y = 6,28/31,4 × 360
y = 72 derajat

L.PQO = 3,14 × 5 × 5 × 72/360
= 3,14 × 5 × 5 × 1/5
= 15,7 cm^2