Zad.1
k² + (5 + a)² = 6²
Zad.2
6² + x² = 10² ([tex]\sqrt[]{21}[/tex])² + (2[tex]\sqrt{7}[/tex])² = x²
36 + x² = 100 21 + 28 = x²
x² = 64 x² = 49
x = [tex]\sqrt[]{64}[/tex] x = [tex]\sqrt{49}[/tex]
x = 8 x = 7
Zad.3
5² + x² = 8² P = 15 + 4 · [tex]\sqrt{89}[/tex] : 2 = 19 : 2 = 9 + [tex]\sqrt{89}[/tex] cm²
25 + x² = 64
x² = 89
x = [tex]\sqrt{89}[/tex]
