geometry 11.6 2016 done.notebook - moore public schools€¦ · m bfg = m afg = m agf = m gbf = m...
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Geometry 11.6 2016 Done.notebook
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February 16, 2016
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11.6 Area of Regular Polygons
Objective
iWBAT: compute area for regular polygons.
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Announcements
Test Friday
Grades
Formula Sheet
Pass Back Quizzes
Make up Quizzes from Friday
Geometry 11.6 2016 Done.notebook
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February 16, 2016
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Bell Work Separate Sheet of Paper
2. What is a "Regular Polygon"?
3. What is a 9 sided polygon called?
1.
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Octagon 8
Geometry 11.6 2016 Done.notebook
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February 16, 2016
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P
Q RS
Inscribed Regular Polygon
Radius:
Center:
Apothem:
Central Angle:
Diameter:
Geometry 11.6 2016 Done.notebook
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February 16, 2016
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m BFA =
m BGF =
m BFG =
m AFG =
m AGF =
m GBF =
m GAF =
72
90
36
36
90
54
54
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Draw the Isosceles Triangle and find the central angle of...
1. Octagon
2. Heptagon
3. Dodecagon
4. Hexagon
Geometry 11.6 2016 Done.notebook
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February 16, 2016
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a = apothem
s = side length
LEFT
RIGHT
Formula Sheet
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Example 1: Regular Octagon
Formula What we know:
Take Out Isosceles!