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How Many Diagonals Does a Polygon Have?

Unit 7: Functions
Lesson 3 of 11

Objective: SWBAT use an In/Out table in a geometric context to find a functional pattern. SWBAT prove why their pattern works.

Big Idea: Bringing some geometry into algebra! Students explore how many diagonals different sized polygons have and try to prove a relationship between the number of sides and the number of diagonals.

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Subject(s):
Math, Algebra, Patterns (Algebra), recursively-defined functions, tables, diagonals, function, Polygons, function
  60 minutes
diagonals
 
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