a)
a=5
b=12
Obliczam c
[tex]c^2=a^2+b^2\\\\c^2=5^2+12^2\\\\c^2=25+144\\\\c^2=169\\\\c=\sqrt{169}\\\\c=13[/tex]
Obliczam obwód
Ob=a+b+c
Ob=5+12+13
Ob=30
b)
a=7,5
c=12,5
Obliczam b
[tex]a^2+b^2=c^2\\\\7,5^2+b^2=12,5^2\\\\56,25+b^2=156,25\\\\b^2=156,25-56,25\\\\b^2=100\\\\b=\sqrt{100}\\\\b=10[/tex]
Obliczam obwód
Ob=a+b+c
Ob=7,5+10+12,5
Ob=30
