1. 1.6 Classify Polygons August 22, 2011
Bellwork
1. What are complementary angles? sum = 90 degrees
2. m JLM? M
105
15 L 105 + 15 = 120
J
3. Given that 3 is a supplement of 4 and m 3=119 , find m 4.
4. Name a pair of vertical angles. 180 ­ 119 = 61
2 1 1,4; 2,5; 3,6
3 6
4 5
5. Did you know that you may use your notes on Bellwork?
Yes you may!
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2. 1.6 Classify Polygons August 22, 2011
1.6 Classify Polygons
Polygon: closed figure w/
1. formed by 3 or more sides
2. each side intersects exactly 2 sides at each endpoint
(no collinear points)
Naming a polygon: list the vertices in consecutive order
A
B D
Vertex
C E
Identifying a polygon:
Convex: no line contains Concave: a line contains a
a point in the interior vs. point in the interior of
of the polygon the polygon.
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3. 1.6 Classify Polygons August 22, 2011
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4. 1.6 Classify Polygons August 22, 2011
Classifying Polygons
3 4 5 6 10
Triangle Quadrilateral Pentagon Hexagon Decagon
n­gon: n is the number of sides
Equilateral: all sides ≅
Equiangular: all angles in interior are ≅
Regular: covex, equilateral & equiangular
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5. 1.6 Classify Polygons August 22, 2011
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6. 1.6 Classify Polygons August 22, 2011
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7. 1.6 Classify Polygons August 22, 2011
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8. 1.6 Classify Polygons August 22, 2011
HW:
pg. 44
#3­29 odds
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