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Mathematics
Mathematics
Problem
If the position vectors of the vertices of a triangle be
2
i
^
+
4
j
^
−
k
^
,
4
i
^
+
5
j
^
+
k
^
2\hat{i} + 4\hat{j} - \hat{k}, 4\hat{i} + 5\hat{j} + \hat{k}
2
i
^
+
4
j
^
−
k
^
,
4
i
^
+
5
j
^
+
k
^
and
3
i
^
+
6
j
^
−
3
k
^
3\hat{i} + 6\hat{j} - 3\hat{k}
3
i
^
+
6
j
^
−
3
k
^
, then the triangle is a. right angled b. isosceles c. equilateral d. None of these
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