Twierdzenie pitagorasa:
a) h² + 7² = 11²
h² + 49 = 121
h² = 72
h = √72
x² = (√72)² + 3²
x² = 72 + 9
x² = 81
x = 9
b) h² + 2² = 7²
h² + 4 = 49
h² = 45
h = √45
(√45)² + x² = 9²
45 + x² = 81
x² = 36
x = 6
y = 6 - 2 = 4
