tlong dijwb semuanya ya ka plissss

a.1/2x 10 x15 = 75 cm²
b.1/2x 14 x20 = 140 cm²
c.1/2x 10 x16 = 80 cm²
d.1/2x 14 x8 = 56 cm²

yg no. 5
60 cm² = 1/2x8xd²
60 cm² = 4 x d²
d² = 60 : 4
d² = 15 cm