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How to prove a rectangle

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How to Prove that a Quadrilateral Is a Rectangle

Let $D'$ be the point such that $ABCD'$ is a rectangle. Then $D'$ is on $AD$ because $\angle A$ is right. From $CD'=AB$ (hold in rectangle) and $AB=CD$ (given), we see

Theorems Dealing with Rectangles

👉 Learn how to solve problems with rectangles. A rectangle is a parallelogram with each of the angles a right angle. Some of the properties of rectangles ar

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