A[0;-2]
B[2;-3]
C[-1;-4]
AB=√[(2-0)²+(-3+2)²]=√[4+1]=√5
AC=√[(-1-0)²+(-4+2)²]=√[1+4]=√5
BC=√[(-1-2)²+(-4+3)²]=√[9+1]=√10
a²+b²=c²
[√5]²+[√5]²=[√10]²
5+5=10
10=10
L=P
tak, to trójkąt prostokątny
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A[0;-2]
B[2;-3]
C[-1;-4]
AB=√[(2-0)²+(-3+2)²]=√[4+1]=√5
AC=√[(-1-0)²+(-4+2)²]=√[1+4]=√5
BC=√[(-1-2)²+(-4+3)²]=√[9+1]=√10
a²+b²=c²
[√5]²+[√5]²=[√10]²
5+5=10
10=10
L=P
tak, to trójkąt prostokątny