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Question

Show that the following points form a right angled triangle.
(-11, 13), (-3, -1) and (4, 3)

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Solution

Given,
A(11,13) B(3,1) C(4,3)

AB=82+142=260, mAB=148

BC=72+42=65 mBC=47

AC=152+102=325

AB2+BC2=AC2 also mAB×mBC=1

Hence ,it is a right-angled triangle .

Right angled at B

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