## Reflection: Developing a Conceptual Understanding How Many Diagonals Does a Polygon Have? - Section 2: Investigation

How Many Diagonals Does a Polygon Have_video narrative_investigation.MP4
How Many Diagonals Does a Polygon Have?

# How Many Diagonals Does a Polygon Have?

Unit 7: Functions
Lesson 3 of 11

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

### Amanda Hathaway

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