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What is a quadrilateral with congruent diagonals?

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Your quadrilateral must be an isosceles trapezoid. Note that rectangles and squares also always have congruent diagonals, but an isosceles trapezoid is the most general term for all the possibilities, since rectangles and squares are isosceles trapezoids in addition to having their own unique properties. read more

trapezoid * * * * * It cannot be a trapezoid because that does not have four congruent sides. In fact it need not have even two congruent sides. read more

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