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c - przekątna
a - bok
A) c = a√2
5√2 = a√2 | * √2
5√4 = a√4
5* 2 = 2a | :2
5 = a
B) 0,7 √2 = a√2 | *√2
2 * 0,7 = 2a | :2
0,7 = a
C) 5√2 /2 = a√2| * √2
5 * 2 / 2 = 2a
5 = 2a | :2
2,5 = a
D) 3 = a√2 | *√2
3√2 = 2a | :2
1,5√2 = a
E) ⅓ = a√2 | *√2
⅓√2 = 2a |: 2 (podzielić przez 2 to to samo co pomnożyć przez ½)
⅓√2 * ½ = a
⅙√2 = a
F) 12 = a√2 | * √2
12√2 = 2a | :2
6√2 = a