Question

determine, if the points (1 ,5) (2, 3) and (-2, -1) are the vertices of an isosceles triangle.​

Answer 1

Answer:

The points (1 ,5) (2, 3) and (-2, -1) are the vertices of an isosceles triangle.

(1 ,5) (2, 3)

$= \sqrt{1 + 4} = \sqrt{5}$

(1, 5) (-2, - 1)

$= \sqrt{9 + 36} = \sqrt{45} = 3 \sqrt{5}$

(2, 3) (-2, - 1)

$= \sqrt{16 + 16} = \sqrt{32} = 4\sqrt{2}$

No this is not an isosceles triangle.