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Regular Polygons

Regular Polygons. 9.3.1.2 Compose and decompose two- and three-dimensional figures; use decomposition to determine the perimeter, area, surface area and volume of various figures. . Guiding Question: How do we find the perimeter and area of regular polygons?.

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Regular Polygons

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  1. Regular Polygons 9.3.1.2 Compose and decompose two- and three-dimensional figures; use decomposition to determine the perimeter, area, surface area and volume of various figures.

  2. Guiding Question: How do we find the perimeter and area of regular polygons? • Lesson Obj: IWBAT to find the perimeter and area of regular polygons. Examples of polygons: Pentagon, Hexagon, Octagon, Decagon, etc. Regular: All sides are congruent and all angles are congruent.

  3. Guiding Question: How do we find the perimeter and area of regular polygons? For any polygon Find the sums Sum of all angles in a polygon is equal to the number of sides minus 2 times 180. Sum = What is the sum of the angles in a Pentagon? Hexagon? Octagon?

  4. Guiding Question: How do we find the perimeter and area of regular polygons? To find the area of a regular polygon. The apothem is similar to a height.

  5. Guiding Question: How do we find the perimeter and area of regular polygons?

  6. Guiding Question: How do we find the perimeter and area of regular polygons? • How can we find the perimeter and area of this hexagon? • Is 8 the apothem?

  7. Guiding Question: How do we find the perimeter and area of regular polygons? How can we find the perimeter and are of this pentagon? A STOP sign is 30 inches from top to bottom, can we figure out the area and perimeter?

  8. Guiding Question: How do we find the perimeter and area of regular polygons? • Assignment: Polygon WS

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