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Mathematics
Mathematics
Problem
If
a
,
b
\mathbf{a}, \mathbf{b}
a
,
b
and
c
\mathbf{c}
c
are the vectors represented by the sides of a triangle, taken in order, then prove that
a
+
b
+
c
=
0
\mathbf{a} + \mathbf{b} + \mathbf{c} = 0
a
+
b
+
c
=
0
.
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