Oct 6, 2020Christy Hanson10 Minute Lesson, 3rd grade, 4th grade, 5th grade, Educational Resources, Mathematics, Multiplication, Problem-solving Strategies, Video3rd grade, 4th grade, 5th grade, Multiplication, Spirit Lake How to Find the Perimeter of a Polygon Learn how to find the perimeter using multiplication and addition and how to identify polygons. Examples including finding the perimeter for a rectangle, triangle, and a square.