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A=(-2 ,9) B= (3,5) C=(-1,0)

AB2  + BC2 = CA2 

Jul 24th, 2015

Thank you for the opportunity to help you with your question!

A( -2, 9) B( 3 , 5) C ( -1 ., 0) AB2 = ( -2 -3)2 + ( 9 -5)2 = 25 + 16 = 41 BC2 = ( 3+1)2 + ( 5 -0)2 =16 + 2 5 = 41 CA2 = ( - 1 +2)2 + ( 0 -9)2 = 1 + 81 = 82 AB2 + BC2 = CA2 ==> angle B = 90 deg ==.ABC is a right angle triangle (2)

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Jul 24th, 2015

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