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# 002 area of regpoly

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### 002 area of regpoly

1. 1. GT Geometry Put CW/HW from yesterday on the corner of your desk, with a pen.
2. 2. Geom Drill 4/23/16 7X+5 2x-3 5x Find the length of the longer of the two parallel sides.
3. 3. Drill Cont What does it mean to circumscribe an object?
4. 4. OBJECTIVE TO STATE AND APPLY THE FORMULA FOR THE AREA OF A REGULAR POLYGON.
5. 5. Find the area of the regular hexagon using formulas you already know. Important information: Regular Hexagon, OA is the radius of the circumscribed circle EF DE CD BC AB FA
6. 6. REGULAR POLYGON Describe perimeter s7 s5 s3 s2 s1 s6 s4 s8
7. 7. REGULAR POLYGON Write a formula for the area s7 s5 s3 s2 s1 s6 s4 s8 a
8. 8. REGULAR POLYGON All angles congruent and all sides congruent.
9. 9. Vocabulary Center of a regular polygon is center of the circumscribed circle.
10. 10. Vocabulary Radius of a regular polygon is distance from the center to a vertex.
11. 11. Vocabulary Central angle of a regular polygon is the angle formed by two radii drawn to consecutive vertices.
12. 12. vocabulary Apothem of a regular polygon is the shortest distance from the center of the polygon to a side.
13. 13. AREA OF A REGULAR POLYGON A = 1/2(ap) a: apothem p:perimeter of the polygon
14. 14. FIND THE AREA:(exact) Apothem is 9, figure is regular
15. 15. FIND THE AREA: (exact) Radius is 4, figure is regular
16. 16. FIND THE AREA: Side is 4, figure is regular
17. 17. CLASSWORK  Worksheet 5.6