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The points whose position vectors are $2 \overrightarrow {i}+3 \overrightarrow {j}+4 \overrightarrow {k},\; 3 \overrightarrow {i}+4\overrightarrow {j}+2 \overrightarrow {k}$ and $4 \overrightarrow {i}+2 \overrightarrow {j}+3 \overrightarrow {k}$ are the verticies of

(a) an isosceles triangle

(b) right angled triangle

(c) equilateral triangle

(d) right angled isosceles triangle
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1 Answer

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(c) equilateral triangle
answered Nov 7, 2013 by pady_1

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