Question

Luas bangun disamping adalah

Answer 1

L. 1/2 Lingkaran = 1/2 × phi × r^2 = 1/2 × 3,14 × 10^2 = 1/2 × 3,14 × 100 = 1/2 × 314 = 157 cm^2
L. Trapesium = (a + b) × t/2 = (75 + 50) × 20/2 = 125 × 10 = 1250 cm^2

L. 1/2 lingkaran + L. Trapesium = 157 + 1250 = 1.407 cm^2

Answer 2

Luas setengah lingkaran =1/2 × 3,14× 10 × 10
=1/2×314=157 cm
luas trapesium =

luas gabungan =