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Perimeter: find the missing side length

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Perimeter: find the missing side length — free printable Grade 4 math worksheet

This worksheet challenges Grade 4 students to find missing side lengths by using perimeter calculations. Teachers can use it to reinforce understanding of perimeter concepts and enhance critical thinking in geometry. Ideal for practicing problem-solving with polygons, it supports mastery of measurement and spatial reasoning skills.

Learning objectives

  • Calculate the perimeter of various polygons by identifying and summing side lengths.
  • Determine missing side lengths using the total perimeter and known side measurements.
  • Apply problem-solving skills to find unknown dimensions in perimeter-related word problems.

How to use this worksheet

  1. Select “Sign in / Sign up to download”, then sign in with Google or email to get the PDF from KiwiBee Printables.
  2. Print at home or in class for Grade 4; it's no-prep, with no extra materials needed.
  3. Hand it out as classwork, homework, or a quick warm-up.

Good for

ClassworkHomeworkWarm-upCentersSmall groups

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