Hi, 

A(3,-4),B(-2,5),  and C(7,10)

 

A. Show that triangle ABC is an isosceles triangle

A(3,-4),B(-2,5),  and C(7,10)

distance AB = = distance AC = 



B. Show that triangle ABC is a right triangle

 m of AB = 

 m of BC = -5/-9 = 5/9

 SLOPES negative reciprocals, lines AB and BC perpendicular, ∠ABC = 90° 

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