Show that (-5,6,8), (1,8,11), ( 4, 2,9) and (-2,0.6) are
the vertices of a square.
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Answer:
A(-5,6,8) B(1,8,11) C(4, 2,9) D(-2,0.6)
AB = 7 ; BC = 7 ; CD = 7 ; AD = 7
AB = BC = CD = AD
so (-5,6,8), (1,8,11), ( 4, 2,9) and (-2,0.6) are
the vertices of a square.
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