Introduction
Webquest, WWW scavenger hunt
1. Today in class, and if you need extra time as homework, follow the www. prompts and research "areas of regular polygons. "
2. Fill in the questions to help understand how to find areas of different regular polygons.
3. Cmplete the worksheet and hand in all work next class period.
Big Ideas: Where do we see Regular Polygons?
https://www.google.com/search?q=what+is+a+regular+polygon&rlz=1C1CHBF_e…
Essential Questions: Why do we need to know how to calculate area of objects?
http://mathforum.org/library/drmath/view/55318.html
Objectives: By the end of this lesson student will understand where we see regular polygons, why we need to know how to calculate area of regular polygons, and how to use formulas to calculate area of regular polygons.
What is a Regular Polygon or n-gon?
https://www.youtube.com/watch?v=jS1W44Pl0ek
What is the difference between a regular and irregular polygon?
https://www.teachstarter.com/teaching-resource/regular-irregular-polygo…
Task
Finding the Area of a Regular Polygon made easy
No
Easier 
Process
Angles of a Regular Polygon
https://www.youtube.com/watch?v=MGy7QG1uxZs
http://www.mathwords.com/a/area_regular_polygon.htm
https://www.khanacademy.org/math/geometry/hs-geo-trig/hs-geo-special-ri…
http://www.mathopenref.com/apothem.html (use for visual display only)
http://study.com/academy/lesson/apothem-definition-formula.html
What is the central angle of a regular polygon?
What is the formula for the central angle of a regular polygon?
What is the interior angle of a regular polygon?
What is the formula for the interior angle of a regular polygon?
The Circle and the Regular Polygon
Draw a circle and label; C=center and R= radius
What is a regular polygon inscribed in a circle?
Draw a circle inscribe a regular polygon and label; C=center and R= radius
What is a regular polygon circumscribed on a circle?
Draw a circle circumscribe a regular polygon and label; C=center and r= radius
The Inscribed Regular Polygon
What is the apothem of a regular polygon?
Draw a 3 sided regular polygon inscribed in a circle.
Label; C =center , R = radius , a = apothem , s = side ,p = perimeter
Draw a 4 sided regular polygon inscribed in a circle.
Label; C =center , R = radius , a = apothem , s = side ,p = perimeter
Draw a 6 sided regular polygon inscribed in a circle.
Label; C =center , R = radius , a = apothem , s = side ,p = perimeter
Formulas for the Area of a Regular Polygon
A = n1/2as
What is A ~
What is n ~
What is a ~
What is s ~
p = ns
What is p ~
What is n ~
What is s ~
A = 1/2ap
What is A ~
What is p ~
What is s ~
What is the Pythagorean theorem?
What is a 30 60 90 triangle?
Label all angles and side dimensions.
Evaluation
