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# 002 area of regpoly

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### Transcript

• 1. GT Geometry &#xF06C;Put CW/HW from yesterday on the corner of your desk, with a pen.
• 2. Geom Drill 4/23/16 7X+5 2x-3 5x Find the length of the longer of the two parallel sides.
• 3. Drill Cont &#xF06C;What does it mean to circumscribe an object?
• 4. OBJECTIVE TO STATE AND APPLY THE FORMULA FOR THE AREA OF A REGULAR POLYGON.
• 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. REGULAR POLYGON Describe perimeter s7 s5 s3 s2 s1 s6 s4 s8
• 7. REGULAR POLYGON Write a formula for the area s7 s5 s3 s2 s1 s6 s4 s8 a
• 8. REGULAR POLYGON &#xF06C;All angles congruent and all sides congruent.
• 9. Vocabulary Center of a regular polygon is center of the circumscribed circle.
• 10. Vocabulary Radius of a regular polygon is distance from the center to a vertex.
• 11. Vocabulary Central angle of a regular polygon is the angle formed by two radii drawn to consecutive vertices.
• 12. vocabulary Apothem of a regular polygon is the shortest distance from the center of the polygon to a side.
• 13. AREA OF A REGULAR POLYGON &#xF06C;A = 1/2(ap) &#xF06C;a: apothem &#xF06C;p:perimeter of the polygon
• 14. FIND THE AREA:(exact) &#xF06C;Apothem is 9, figure is regular
• 15. FIND THE AREA: (exact) &#xF06C;Radius is 4, figure is regular
• 16. FIND THE AREA: &#xF06C;Side is 4, figure is regular
• 17. CLASSWORK &#xF06C; Worksheet 5.6