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Perimeter and Area

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Objectives Calculate the area of given geometric figures. Calculate the perimeter of given geometric figures. Use the Pythagorean theorem to find the lengths of a side of a right triangle. Solve word problems involving perimeter, area, and/or right triangles.

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Vocabulary polygon perimeter area trapezoid parallelogram triangle rectangle circle circumference radius diameter legs (of a right triangle) hypotenuse

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Area Formulas Triangle Rectangle and Parallelogram Trapezoid Heron’s Formula for Area of Triangle

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Circle Formulas Circumference (Perimeter) Area

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Pythagorean Theorem For right triangles a b c

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Find the perimeter and area of the figure below

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Find the area of the figure below

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Find the length of the third side of the triangle below

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Find the perimeter and area of the circle below

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Find the perimeter and area of the semicircle below

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Walk 100 yards south, then 120 west and then 30 yards south. How far from the original starting point are you?

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