Does a triangle have 2 be right angled if a square equal to b square plus c square?
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If two triangles have two sides of the one equal to two sides of the other, each to each, and the angles included by those sides equal, then the triangles are congruent (side-angle-side). The area of a triangle is half the area of any parallelogram on the same base and having the same altitude.
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Yes, a triangle have to be right angled.
Converse of Pythagoras theorem proves it.
Converse of Pythagoras theorem proves it.
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