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 Challenge
 Line of Symmetry:  A line that divides a figure into two parts, each of which is a mirror image of the other.

Quadrilateral Conjectures: Make conjectures about properties of quadrilaterals and provide examples or counterexamples.

Symmetry Lines: Determine the number of symmetry lines a polygon has.

Symmetry Lines II: Find polygons that have line symmetry.

SAM: Explore symmetry with altitudes and medians.

Symmetry of Polynomial Functions: Describe the symmetry of a function.