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The diagonals of a square. Each equals to s√2, where s is the side-length of the square.

A rectangle and an isosceles trapezoid also have congruent diagonals.

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Q: In which quadrilateral are the diagonals always congruent?
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Related questions

Are diagonals always congruent?

In a quadrilateral, the diagonals are only congruent for rectangles (or squares, which is a special kind of rectangle). Note: they are not congruent for a Rhombus.


What is a quadrilateral with diagonals that are always congruent and always has four 90 angles?

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Can a quadrilateral be a parallelogram is the diagonals are congruent but the quadrilateral has no right angles?

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The quadrilateral that must have diagonals that are congruent and perpendicular is the square. This is because its diagonals form a right angle at its center.


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