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2015-10-01T23:04:59+05:30

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AB²= (-3-2)²+(-4-6)²
= 25+100
=125 units.
BC²= (2+6)²+(6-10)²
=64+16
=80 units.
AC²=(-3+6)²+(-4--10)²
=9+196
=205 units.
If it is a right triangle, AB²+BC²=AC².
But, here, 80+125=205.
=205.
Therefore, these are the vertices of a right triangle.

Thank you.
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