Answer:
ABC is a right triangle
Step-by-step explanation:
Perpendicular lines have 90 degree angles.
Perpendicular lines have slopes that are negative reciprocals, that means when you multiply them together they equal -1
Slope AB * slope BC = -1
2/5 * -5/2 = -1
-1 = -1
So AB is perpendicular to BD, which means it forms a 90 degree angle
That means ABC is a right triangle
