tolong ya nomor 12 plz bsk dikumpulin

L1 = p × l
= 7 × 10
= 70 cm²

L2 = ½ × ( a + b ) × t
= ½ × ( 10-6 + 10 ) × ( 20 - 5 - 7)
= ½ × ( 4 + 10) × 8
= ½ × 14 × 8
= 56 cm²

L3 = p × l
= 10 × 5
= 50 cm²

Lttl = L1 + L2 + L3
= 70 + 56 + 50
= 176 cm²