Cutting Corners (triangle/quadrilateral lesson)

[Sharma]

(See links at bottom for full lesson w/handouts)

Lesson Objective: Students will cut a polygon into two new shapes and come to understand the meaning of both the nouns (shape names) and the adjectives used to describe polygons by applying them to new and different shapes. They will further solidify this knowledge by analyzing others’ posters to see which adjectives are redundant or necessary to understand the definitions of the shapes.

Materials Used:
Copies of polygons on colored paper
Scissors
Tape
Chart Paper
Markers
Post-it notes
The Greedy Triangle book
Blank Paper
Colored Pencils

Teacher guide: http://auhsdmath.pbworks.com/w/file/fetch/70845651/Cutting%20Corners%205ETeacher%20Plan.pdf

Pre-assessment: http://auhsdmath.pbworks.com/w/file/fetch/70845648/CutCornerOpenQ%26TicDoor.pdf

Shapes: http://auhsdmath.pbworks.com/w/file/fetch/70845649/CutCornersShapes.pdf

Definition page: http://auhsdmath.pbworks.com/w/file/fetch/70845656/CuttingCornersDefs.pdf

Extension questions: http://auhsdmath.pbworks.com/w/file/fetch/70845654/Cutting%20Corners%20Extension%20Questions.pdf

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