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A triangle has vertices A(-1,3,4) , B(3,-1,1,) and C(5,1,1). Prove that it is right-angled? And how do you determine the fourth vertex needed to complete a triangle? Please help…

A triangle has vertices A(-1,3,4) , B(3,-1,1,) and C(5,1,1). Prove that it is right-angled? And how do you determine the fourth vertex needed to complete a triangle? Please help…
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A triangle has vertices A(-1,3,4) , B(3,-1,1,) and C(5,1,1). Prove that it is right-angled? And how do you determine the fourth vertex needed to complete a triangle? Please help.

User Ruam Pimentel
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7.8k points

1 Answer

4 votes
By Subtracting Vertces A from B and youll get the answer
User Haccks
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7.7k points
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