hitunglah luas permukaan pakai cara

1. (9 × 9) × 3
→ 81 × 3 = 243 cm

2.(10 × 10) × 2
→100 × 2 = 200 cm

3.(7 × 7) × 3
→49 × 3 = 147 cm

4.

5.(12 × 12) × 2
→144 × 2 = 288 cm