Odpowiedzi

2010-02-08T18:08:34+01:00
A : b = 3:4
a/b = 3/4
4a = 3b
a = 3/4b
a² + b² = c²
(3/4b)² + b² = 3²
9/16b² +b² = 9
1 9/16b² = 9
25/16b² = 9 / * 16/25
b² = 144/25
b = 12/5
b = 2 ⅖
a = ¾ * 12/5 = 9/5 = 1⅘
2 3 2