SOLUTION: A right triangle whose vertices are A(2,0) , B(-1,4) , and C(-2,-3) . Find the vertex angle whose measure is equal to 90 degree .

Question 1016136: A right triangle whose vertices are A(2,0) , B(-1,4) , and C(-2,-3) . Find the vertex angle whose measure is equal to 90 degree .
Answer by FrankM(1040) (Show Source): You can put this solution on YOUR website!
slope equation
This is introduced for the fact that 2 lines which are perpendicular have slopes that are negative reciprocals of each other. So, we'll calculate the slopes formed by the lines joining these points.
AB -

BC -

AC -

Lines AB and AC have slopes which are negative reciprocals, and they meet at point A.

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