polygon exterior angle sum theorem proof

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Students given time today during class to use laptops or magazines to find special angle pair pictures.
Parallel Lines and Transversals Proofs, thursday, November.Worksheet (Geometry in this worksheet students must name polygons, revisor de texto word 2010 identify convex, concave, regular and irregular polygons, classify polygons by the number of sides (triangle, quadrilateral, pentagon, hexagon, octagon, nonagon, decagon, dodecagon and use both the Polygon Angle Sum Theorem to find measures of interior angles.A decagon has 10 sides, so: Example 2: Find the exterior angle sums, one exterior angle at each vertex, of a convex nonagon.Theorem 39 gives: An exterior angle of a polygon is formed by extending only one of its sides.HW-triangle-sum-2-answers, hW-triangle-sum-answers, friday, November 13, daily bell work.Wednesday, November 11, nO bell work.Example 3: Find the measure of each interior angle of a regular hexagon (Figure 3).The nonstraight angle adjacent to an interior angle is the exterior angle.



Students will be completing an assignment with multiple problems solving for missing angles of a triangle or supplementary or vertical angles.
Theorem 40: If a polygon is convex, then the sum of the degree measures of the exterior angles, one at each vertex, is 360.
Each interior angle of a regular hexagon has a measure of 120.
Look at Figure.
Thurs HW triangle angle sum page 2. Project due for Moleski/Roumayah on November. Quiz from last week Friday returned (students self-assessing mistakes).November project rubric parallel line booklet project, tuesday, November.The interior angle sum of this polygon can now be found by multiplying the number of triangles by 180.Method 1: Because the polygon is regular, all interior angles are equal, so you only need to find the interior angle sum and divide by the number of angles.Theorem 39: If a convex polygon has n sides, then its interior angle sum is given by the following equation: S ( n 2) 180.This fact is stated as a theorem.