Question

Va rog ajutati-ma! Rapid!

Answer 1

1. 20 ari = 2000m²

0.4ha=400m²

2430dm²=24.3m²

2. A= l² = 4² = 16 dm²

3. P dreptunghi = 2(L+l)= 2(6+8)= 28 dm

P patrat = 4l => l=7 dm

A pătrat = l² = 49 dm²

4. L= 2l

A dreptunghi = l×L => 32 = 2l² => l = 4 m

L= 2×4=8 m

P=2(l+L)= 2×12 = 24m

5. 8900 cm² - 2500 cm²= 6400 cm²

l=80 cm