hitung luas bangun gabungan

L1 = ½ × a × t = ½ × 18 × 10 = 90 cm²

L2 = 3 × s² = 3 × 18 × 18 = 972 cm²

L3 = 2 × ½ × a × t = 2 × ½ × 9 × 18 = 162 cm²

L4 = p × l = 30 × 10 = 300 cm²

L5 = 2 × ½ × a × t = 2 × ½ × 8 × 10 = 80 cm²

L6 = p × l = 14 × 8 = 112 cm²

Lttl = 90 + 972 + 162 + 300 + 80 + 112 = 1716 cm²