Question

In ABC the coordinates of vertices A and B are A (-2,4) and B (-1,1) for each of the given coordinates of vertex c , is ABC a right triangle ? Select right triangle or not a right triangle for each set of coordinates .

Answer 1

A right triangle is a triangle that has 90 degrees angle in one of its parts. You are given two points that have coordinate:
x1,y1= (-2, 4)
x2,y2= (-1,1)
To make the angle 90 degrees, there is two possible third point coordinate:
1. x1, y2 = (-2,1)
2. x2, y1= (-1,4)

The right triangle would be option C: (-2,1)
Option A and B is not a right triangle