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Illustrative Mathematics
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Angles of Rectangle - Interior Angles, Diagonal Angles and Sum of Angles
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The diagonals of a rectangle are 12 inches long and intersect at an angle of 60^o . Find the perimeter of the rectangle. | Homework.Study.com
4) Rectangle Properties – GeoGebra
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Rectangle Sides, Diagonals, and Angles -properties, rules by Example
Learn About Properties of Rectangles | Caddell Prep Online
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Diagonal of Rectangle - Properties, Formulas & Diagrams
geometry - A rectangle has diagonals $d$ and the acute angle between the diagonals $\alpha$, express... - Mathematics Stack Exchange
Quadrilaterals | GMAT Free
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Rectangle - Definition, Properties, Formulas
