Grade 3/Geometry
Perimeter Word Problems: Multiple Choice (715)
Solve lively perimeter-only stories set around the Shark Splash Festival, focusing on measuring borders, lights, and safety rails.
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Teacher Resources
Standards
CCSS.MATH.CONTENT.3.MD.C.5Teaching Notes
Emphasize drawing rectangles and labeling sides. Discuss real-world uses of perimeter calculations.
Vocabulary
Perimeter: The total distance around the outside of a shape.
Rectangle: A four-sided shape with four right angles.
Common Mistakes
- Adding only one pair of sides instead of doubling
- Confusing perimeter with area in word problems
- Dropping the meters unit from the answer
- Forgetting to double
- Adding only two sides
- Arithmetic slips
- Confusing with area
Differentiation
SupportProvide grid paper for sketching.
ChallengeCreate own perimeter problems.
Discussion Questions
- What is perimeter?
- When is perimeter used?
- How is it different from area?
- What if a side length is unknown?
Extension Activities
- Find perimeter of squares.
- Solve word problems with larger numbers.
- Draw shapes with a given perimeter.
Parent Tip
Help your child measure the perimeter of doors and windows at home.
Learning Path
Skill Cluster
Geometry & Measurement
Estimated Time
16 minutes
Skills Practiced
Interpreting perimeter word problemsSelecting the correct formula for perimeterUsing units in final answersChecking arithmetic before doubling
Prerequisites
- Perimeter of rectangles (numbers)
- Addition skills
- Basic measurement concepts
Next Steps
- Area of Rectangles
- Perimeter of Irregular Polygons
- Area of Rectangles Challenge
- Perimeter: Find Missing Sides