k tolong bgt yh dibantu.. .. no 2 sama 3. pke cara ny dong

2) Luas jajaran genjang
L = a × t
L = 70 × 30
L = 2100 cm²

3) L1 = ½ × a × t
= ½ × 40 × 10
= 200 cm²
L2 = a × t
= 40 × 15
= 600 cm²
Lttl = 200 + 600 = 800 cm²