tolong jawab pakai Cara Dia soal

2)
Luas setengah Lingkaran
D = 20 cm
r = D/2 = 20 cm / 2 = 10 cm

L = 1/2 .π.r²
L = 1/2 x 3,14 x 10²
L = 1/2 x 3,14 x 100
L = 157 cm²

Luas Trapesium
a = 30 cm
b = 23 cm
t = 20 cm

L = 1/2 x (a + b) x t
L = 1/2 x (30 + 23) x 20
L = 53 x 10
L = 530 cm²

Luas Keseluruhan
L = 157cm² + 530 cm²
L = 687 cm²

3)
a = 10 cm
b = 14 cm
t = 6 cm

L = 1/2 x (a + b) x t
L = 1/2 x (10 cm + 14 cm) x 6 cm
L = 24 cm x 3 cm
L = 72 cm²