oblicz obwód trójkąta ABC gdy: A=(0;2) B=(2;4)i C=(5;1)
Obliczone z twierdzenia pitagorasa:
|AB|:
x^2=2^2+2^2
x^2=4+4
x=\sqrt{8}
|BC|:
y^2=3^2+3^2
y^2=9+9
y=3\sqrt{2}
|AC|:
z^2=5^2+1^2
z^2= 25+1
z=\sqrt{26}
Obwód:\sqrt{8}+3\sqrt{2}+\sqrt{26}
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Obliczone z twierdzenia pitagorasa:
|AB|:
x^2=2^2+2^2
x^2=4+4
x=\sqrt{8}
|BC|:
y^2=3^2+3^2
y^2=9+9
y=3\sqrt{2}
|AC|:
z^2=5^2+1^2
z^2= 25+1
z=\sqrt{26}
Obwód:\sqrt{8}+3\sqrt{2}+\sqrt{26}