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Published byPhillip Lindsey Modified over 8 years ago

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D ERIVING A REA F ORMULAS You already know the formulas but where do they come from?

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R ECTANGLE In your groups discuss how you can use a parallelogram to develop the area formula for a rectangle Be able to justify your answer using a diagram or written explanation http://illuminations.nctm.org/activitydetail.aspx?i d=47

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T RIANGLE In your groups discuss how you can use a square to develop the area formula for a triangle Be able to justify your answer using a diagram or written explanation

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TRAPEZOID In your groups discuss how you can use a parallelogram to develop the area formula for a trapezoid Be able to justify your answer using a diagram or written explanation

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R HOMBUS & K ITE In your groups discuss how you can use a rectangle to develop the area formula for a Rhombus and Kite. Label the diagonals as d 1 and d 2 Be able to justify your answer using a diagram or written explanation http://www.brightstorm.com/math/geometry/area/ area-of-kites-and-rhombuses/

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