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Mathematics 21 Online
OpenStudy (bigmoee19):

Which of the following are necessary when proving that the diagonals of a rectangle are congruent? Check all the apply A:Opposite side are perpendicular B: all obtuse angles are congruent C: opposite sides are congruent D: all right angles are congruent

OpenStudy (bigmoee19):

Anyone know?

OpenStudy (sylph):

Try to guess it. The fact alone that it's a rectangle proves it...

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