MA19.3.25

Mathematics (2019) Grade(s): 3

MA19.3.25

Solve real-world problems involving perimeters of polygons, including finding the perimeter given the side lengths and finding an unknown side length of rectangles.

Unpacked Content

Knowledge

Students know:
  • Measurable attributes of objects, specifically perimeter.
  • Strategies for modeling measurement problems involving perimeter.
  • Strategies for representing and computing perimeter.

Skills

The Students are able to:
  • Solve real-world and mathematical problems involving perimeters of polygons.
  • Find the perimeter of a figure given the side lengths.
  • Find an unknown side length of a polygon given the perimeter and one missing side length.

Understanding

Students understand that:
  • Perimeter is measured in length units and is the distance around a two-dimensional figure.
  • If all the sides of a polygon are equal, then the perimeter can be determined by multiplying one side length by the total number of sides.

Vocabulary

  • Attribute
  • Dimension
  • Perimeter
  • Polygon
  • Two-dimensional

Aligned Learning Resources

Perimeter StudyJam
Finding the Unknown Side of Safety Signs
Perimeters of Pools
Perimeter Introduction Activity
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