b)
a = 6
b = 5
c = ?
z twierdzenia pitagorasa
a² + b² = c²
6² + 5² = c²
36 +25 = c²
c² = 61
c = √61
c)
a = 12
b = ?
c = 15
12² + b² =15²
144 + b² = 225
b² = 225 - 144
b² = 81
b = √81
b = 9
