Let be a triangle

MATHEMATICS · Single correct · CBSE · Mathematics · Introduction to Three-Dimensional Geometry · Introduction to Three-Dimensional Geometry

Problem

Let ABCABC be a triangle, the position vectors of whose vertices are 7j^+10k^7\hat{j} + 10\hat{k}, −i^+6j^+6k^-\hat{i} + 6\hat{j} + 6\hat{k} and −4i^+9j^+6k^-4\hat{i} + 9\hat{j} + 6\hat{k} . Then, ΔABC\Delta ABC is (1) isosceles (2) equilateral (3) right angled (4) None of these

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