Q. 14 A

# Determine the type (isosceles, right angled, right angled isosceles, equilateral, scalene) of the following triangles whose vertices are:

(1, 1), (- ), (- 1, - 1)

Answer :

Given points are A(1, 1), B(- √3, √3) and C(- 1, - 1).

Let us find the distance between sides AB, BC and CA.

We know that the distance between the two points (x_{1}, y_{1}) and (x_{2}, y_{2}) is

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We got AB = BC = CA

∴ The given points form an equilateral triangle.

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