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Warm-up Date 02/26/09 Sec 9-1 Introduction to Geometry

Warm-up Date 02/26/09 Sec 9-1 Introduction to Geometry. Use the figure. Name each of the following. Date 02/26/09 Sec 9-3 Classifying Polygons. Goal:. To classify triangles To classify quadrilaterals. Key Words:.

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Warm-up Date 02/26/09 Sec 9-1 Introduction to Geometry

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  1. Warm-up Date 02/26/09 Sec 9-1 Introduction to Geometry Use the figure. Name each of the following.

  2. Date 02/26/09 Sec 9-3 Classifying Polygons

  3. Goal: • To classify triangles • To classify quadrilaterals

  4. Key Words: A polygon is a closed plane figure with at least three sides. A regular polygon is a figure with all sides congruent and all angles congruent.

  5. Acute Right Obtuse acute right obtuse Scalene Equilateral Isosceles no 3 2 All angles are less than 90° Acute: Has one 90° angle. Right: Obtuse: One angle between 91° and 179°.

  6. Trapezoid Quadrilateral 4 parallel Parallelogram parallel Rhombus Square Rectangle congruent 90° 90° congruent equal Congruent:

  7. no obtuse The triangle is a scalene obtuse triangle.

  8. parallelograms trapezoids rectangles squares

  9. P = 12x 3 3 36 36

  10. isosceles scalene obtuse triangle right triangle

  11. rectangle square P = 6x P = 6(16) = 96 cm

  12. On-Line Help Web Site: PHSchool.com Tutor Web Code: ade-0903 Lesson Quiz Code: ada-0903

  13. Planner: • Write today’s goal. • Write today’s assignment.

  14. Assignment: • Pr 9-3 • Reflective journal

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