Answer:
it's isosceles!
Explanation:
the points form a right triangle, which eliminates equiangular without even thinking about it since equiangular triangles must have all equal angles, which is impossible with a 90 degree angle since all angles of a triangle add up to 180. Equilateral is also eliminated because the side lengths are not equivalent. Scalene is also eliminated because the two sides adjacent to the 90 degree angle are congruent. This leaves isosceles. It is isosceles because it has two congruent side lengths and two congruent angles.