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8.5 Classifying Polygons

8.5 Classifying Polygons. Understanding Polygons and Regular Polygons. # of sides. Polygon - A closed figure with at least 3 sides. Regular Polygon - Polygon with ALL sides congruent and ALL angles congruent. Regular Polygons. Polygons. Drawing. Drawing. Name. Name. Acute

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8.5 Classifying Polygons

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  1. 8.5 Classifying Polygons

  2. Understanding Polygons and Regular Polygons # of sides Polygon - A closed figure with at least 3 sides. Regular Polygon - Polygon with ALL sides congruent and ALL angles congruent. Regular Polygons Polygons Drawing Drawing Name Name Acute Equilateral 3 Triangle 4 Quadrilateral Square Regular Pentagon 5 Pentagon Regular Hexagon 6 Hexagon

  3. Classifying Triangles Angle Name Acute - All angles less than 90 . - Only One angle equal to 90 . Right - Only One angle more than 90 . Obtuse Side Name - All three sides equal. - Two sides equal. Equilateral Isosceles - No equal sides. Scalene

  4. Every triangle has angles whose sum equals 180 . b c a x Angles of a Triangle Solve for x.

  5. Classifying Quadrilaterals

  6. Understanding Quadrilaterals A quadrilateral… With TWO pairs of parallel lines With ONE pair of parallel lines With ZERO pairs of parallel lines …and two pairs of congruent sides …and a pair of non-parallel sides congruent …and four right angles …and all sides congruent …and all sides congruent

  7. Homework • Page 457 (9-26) all

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