hitung luas yg di arsir dengan caranya

Segitiga 1 Luas
= 1/2at
= 1/2 × (10+8+4) × (12:2)
= 1/2 × 22 × 6
= 11 × 6
= 66 cm²

Segitiga 2 luas
= 1/2at
= 1/2 × (8+10) × (12:2)
= 1/2 × 18 × 6
= 9 × 6
= 54 cm²

Jumlah luas
= l¹ + l²
= 66 + 54
= 120 cm²