Question

2 Change these areas to square centimetres (cm²).
a 3600 mm²
b 3.5 m²
c 0.8 km²
timotres fem

Answer 1

Since 1mm is equal to 0.1 cm, 1mm² will be equal to 0.01 cm²
Same with meters, 1m = 100 cm; 1m² = 10000 cm²
1 km = 1000m = 1000000m² = 1000000 * 10000 cm²;

a) 3600 mm² = 3600 * 0.01 cm² = 36 cm²
b) 3.5m² = 3.5 * 10000 cm² = 35000 cm²
c) 0.8 km² = 0.8 * 10000000000 cm ² = 80000000000 cm²