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Mathematics
Mathematics
Problem
Let
A
B
C
ABC
A
B
C
be a triangle, the position vectors of whose vertices are
7
j
^
+
10
k
^
7\hat{j} + 10\hat{k}
7
j
^
+
10
k
^
,
−
i
^
+
6
j
^
+
6
k
^
-\hat{i} + 6\hat{j} + 6\hat{k}
−
i
^
+
6
j
^
+
6
k
^
and
−
4
i
^
+
9
j
^
+
6
k
^
-4\hat{i} + 9\hat{j} + 6\hat{k}
−
4
i
^
+
9
j
^
+
6
k
^
. Then,
Δ
A
B
C
\Delta ABC
Δ
A
B
C
is a. isosceles b. equilateral c. right angled d. None of these
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