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Do Now Find the value of x. 1. 22 + x + 10 = 65 2. 5x + 125 = 360 3. 180 = 55 + x 4. x + 2x = 30

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Objective: classify polygons and quadrilaterals Homework: p545 #7-9, 11-20 10.2 Polygons & Quadrilaterals

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Key Terms Polygon: _______________________________________ _______________________________________ Regular Polygon: __________________________________________ __________________________________________

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Key Terms Convex: ___________________________________________ __________________________________________ Concave: ___________________________________________ ___________________________________________

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Polygons Not Polygons

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Example 1: Identify & Classify the Polygon Tell whether the figure is a polygon. If it is a polygon, classify it an tell whether it is convex or concave.

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Checkpoint Tell whether the figure is a polygon. If it is a polygon, classify it an tell whether it is convex or concave.

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Quadrilaterals Diagram Trapezoid: A quadrilateral with exactly one pair of parallel sides Parallelogram: A quadrilateral with both pairs of opposite sides parallel. Rhombus: A parallelogram with 4 congruent angles.

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Quadrilaterals Diagram Rectangle: A parallelogram with 4 right angles. Square: A parallelogram with 4 right angles and 4 congruent sides.

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Example 2: Classify the Quadrilateral

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Example 3: Angles in Quadrilaterals Find the value of x. 68 x 2x

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