hitunglah luas bangun datar berikut. dengan caranya

a. L1 = 1/2× (12+9) × 2
= 1/2 ×21×2
=21

L2 = p×l
= 12×5
=60

Ltot = Lt + Lp
=12+60
=72

b. L1= 6×6
=36

l2= 1/2× (9+6)× 3
= 1/2 × 15× 3
= 22.5

Ltot = 72+ 22.5
= 94.5

c. L1 = 1/2 ×12×5
=30

l2 = 1/2× 13 ×6
= 39

ltot = 30 + 39
= 69

d. l1 = 1/2×4 ×4
= 8

l2= 1/2 ×8× 6
= 24

ltot = 8+24
=32j