The points $A, B, C$ with position vectors $2 \vec{i}-\vec{j}-\vec{k}, \vec{i}-3 \vec{j}-5 \vec{k}$

Question

The points $A, B, C$ with position vectors $2 \vec{i}-\vec{j}-\vec{k}, \vec{i}-3 \vec{j}-5 \vec{k}$ and $3 \vec{i}-4 \vec{j}-5 \vec{k}$ are the vertices of

Professor PC Thomas Classes · Answer

Distance formulas confirm it is a right angled triangle.