Question

Easy question, decent amount of points! 25 points, if you're curious!
Be quick or it is gone.

Answer 1

Find the slopes of the three sides.

slope of AB = 2/(-5) = -2/5

slope of AC = -2/(-4) = 1/2

slope of BC = -4/1 = -4

No two slopes have a product of -1, so no two sides are perpendicular.
Therefore, the triangle is not a right triangle.