Day 3 Angles In Polygons

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Day 3 Angles In Polygons

  1. 1. AIM: Sum of the Angles of Polygons Do Now Weekly Quiz #12 1
  2. 2. Homework: Pages 380-381 #7-23 all, 27-35 all 2
  3. 3. 3
  4. 4. 1.) The figure has how many sides? 2.) From vertex A, how many segments can be draw to other vertices? 3.) Draw all the segments from vertex A. 4.) How many triangle are created when the segment are drawn? Sum of the measure of = Number of Triangles • Sum of the measure of the angles of a hexagon the angles of a triangle __________________ = ________________ • _________________ 4
  5. 5. 5.) Use the same procedure to find the sum of the measures of the angles of the following figures. 5
  6. 6. Question: What is the relationship between the number of sides of a polygon and the number of triangles that can be drawn inside? Question: How can I re-write the formula? 6
  7. 7. 1   3.) Use the formula to find the sum of the measures of the angles of the following polygons. Name: ______ Sum = ______ 7
  8. 8. 2   3.) Use the formula to find the sum of the measures of the angles of the following polygons. Name: ______ Sum = ______ 8
  9. 9. 3   3.) Use the formula to find the sum of the measures of the angles of the following polygons. Name: ______ Sum = ______ 9
  10. 10. Example 1: How many sides does a polygon have if the sum of its interior angles is 12600? 10
  11. 11. 4.) Find the missing angle for the following quadrilaterals. x 1350 700 450 1050 x 11
  12. 12. Before You Leave 1.) The interior angles have a sum of 3600. 2.) The interior angles have a sum of 5400. 3.) Each angle is a 600 angle. 12
  13. 13. Mr. Tjersland's Math 7 Homework: Pages 384-385 #7-20 all, 23, 26-31 all 13
  14. 14. AIM: Sum of the Angles of Polygons Sum of Angles (where n = of a Polygon = (n - 2)180 number of sides) 14
  15. 15. AIM: Sum of the Angles of Polygons Sum of Angles (where n = of a Polygon = (n - 2)180 number of sides) 15
  16. 16. Attachments Hexagon.gsp Octogon Pentagon.gsp

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