Odpowiedzi

2010-03-28T21:00:46+02:00
Bok a - x
bok b - 2x
d = 5
z tw. Pitagorasa:
x²+(2x)² = d²
x²+4x² = 5²
5x² = 25 /:5
x² = 5
x = √5
bok a = √5
bok b = 2x = 2√5
Obwód = 2a+2b
Ob = 2*√5+2*2√5
Ob = 2√5+4√5
Ob = 6√5