Prove that the points (2, 3), (-4, -6) and (1, 3/2) do not form a triangle.
Let the Vertices of a triangle ABC are: A(2, 3), B(-4, -6) and C(1, 3/2)
Length of side AB =
Length of side AB =
= 
= 
units
Length of side BC =
= 
= 
units
Length of side AC =
= 
= 
units
The given vertices do not form a triangle, since sum of two sides of a triangle are not greater than third side.
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