tolong jawab pertanyaan ini

L1 = ½ × (a + b) × t
= ½ × (14 + 40) × 8
= ½ × 54 × 8
= 216 cm²

L2 = ½ × a × t
= ½ × 10 × 10
= 50 cm²

Lttl = L1 + L2
= 216 + 50
= 266 cm²