Question 1016145
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Slope AB=(4-0)/(-1-2)=-4/3
Slope BC=(-3-4)/(-2-(-1))=(-7)/(-1)=7
Slope AC=(-3-0)/(-2-2)=(-3)/(-4)=3/4
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The slope of AC is the negative reciprocal of the slope of AB, 
therefore AC and AB are perpendicular. 
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ANSWER: Angle BAC is the right angle