TEMPLATE LINK FOR TEACHERS TO CONTRIBUTE:
SolidWorks Lesson Template for Teachers to Contribute
Cover Sheet for Exemplary Lessons/Units Project
Faculty Member Name:___Paul Reetz____________ Date: _August 30, 2006_
School District: __Portland Public Schools______________________________
Teacher’s School email address: __preetz@pps.k12.or.us____________________________________________
Title of Lesson/Unit:
__Polygon Sum Conjecture __________________________________________
Science, Technology, Engineering and Math) STEM Concepts Addressed: ____Algebra and Geometry - discovery learning to find a formula to figure the sum of
the interior angles of an n-gon______________________________________________
Length of instruction period: __20________
How many periods needed to implement lesson unit: ____1 or 2______
Grade Level(s) for use:
____8 - 12______________________________________________
Objectives:
1. _The students will draw geometric solids and dimension all of the angles.________
2. _The students will total the included angles in geometric solids.________________
3. _The students will use their knowledge of figuring out patterns to come up with the
equation for the sum of the angles inside the nth geometric solid. __________
Materials:
_SolidWorks, Calculator, pencil and paper__________________________
Procedures:
1. _Have students draw and dimension a triangle, a quadrangle, a polygon, a hexagon, a heptagon, and an octagon.
2. Have the students make a drawing that includes the polygons that they just created.
3. Record the total number of included angles in each polygon.
4. Using the total number of angles in each polygon find a rule that will work with all polygons and state what the total number of degrees will be for an n-gon.
Assessment:
__Students should have completed the drawings and also found the Polygon Sum Conjecture “180(n-2)+degrees.”________________________________________
Resources Used: _________________________________________________________
Copyrighted Materials: ___________________________________________________
• What materials did you employ from published sources?
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