The vertices of a triangle are P(-3,1,2), Q(1,-3,-1) and R(3,-1,-1)(adsbygoogle = window.adsbygoogle || []).push({});

-Verify that it is a right angled

-Determine the area

-Determine the perimeter

-What are the coordinates of S(x,y,z) such that PQRS is a rectangle

I'm not sure how to start to go about solving this problem. Could someone give me a nudge forward? =/

Thank you.

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# Homework Help: Geometry Help

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