Quadrilaterals

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Angle Sum of a Quadrilateral

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Rectangles, Squares, Parallelograms and Rhombuses

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Trapezoids and Scalene Quadrilaterals

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Area of a Rectangle, Square, Parallelogram and Rhombus

Calculate the Area of a Rectangle, Square, Parallelogram and Rhombus

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Area of a Trapezoid

What Is the Area Formula for Trapezoids?

The area formula for a trapezoid is $a$ plus $b$ , times $h$ , divided by 2. This video includes examples showing you where the formula comes from.

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Calculate the Area of a Trapezoid

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