Perimeter with unknown sides! In this cut and paste activity, students will find the missing side of a polygon, then add the sides to find the perimeter.
They will use the answer choices on the paper and cut them out and glue them next to the unknown side. When complete, they can glue their paper in their math journal, or turn in as an assessment (or both).
Includes an "I can" statement so that students can cut and paste this activity in their math journal.
3rd grade CCSS
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