The slope of AB is - 3/2. Which statement proves that ΔABC contains a right angle?

Answer 1

We need more information to definitively prove that triangle ABC contains a right angle. Knowing the slope of AB gives us information about the angle that line AB makes with the x-axis, but it does not necessarily tell us anything about the angles within triangle ABC. We would need additional information, such as the slopes or lengths of other sides, or the values of specific angles, to prove that triangle ABC contains a right angle.