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A sufficient condition that a triangle T be a right triangle is that a2 + b2 = c2. An equivalent statement is

A. If T is a right triangle then a2 + b2 = c2.
B. If a2 + b2 = c2 then T is a right triangle.
C. If a2 + b2 6= c2 then T is not a right triangle.
D. T is a right triangle only if a2 + b2 = c2.
Answer» C. If a2 + b2 6= c2 then T is not a right triangle.


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