yg Ngerti tolongg bantuin jawab yaa kaka, pakaii cara nyaa.. mksih.

Bab Bangun Datar
Matematika SMP Kelas VII

a] RS / BC = QR / CD
RS / 3 = 30 / 12
RS = 3 x 30/12
RS = 7,5 cm

b] PS = QR = 30 cm

c] PQ = RS = 7,5 cm

d] AB = CD = 12 cm

e] AD = BC = 3 cm

Perbandingan sisi kedua bangun
CB /RQ = 3/30 = 1/10

CD/RS = 1/10
RS = 10 CD = 12 × 10 = 120

PS = QR = 30

PQ = RS = 120

AD = BC = 3