Odpowiedzi

2010-02-20T17:21:14+01:00
X² + (2x)² = 5²
x² + 4x² = 25
5x² = 25 |÷5
x² = 5
x = √5

L = 2√5 + 2(2√5) = 2√5 + 4√5 = 6√5 cm
11 4 11