Free Printable WorksheetMathGrade 4Math Curriculum4.129

4.129 Solve Perimeter Word Problems Including Unknown Sides Worksheet

Download our free printable Grade 4 Math worksheet on 4.129 Solve Perimeter Word Problems Including Unknown Sides. Ideal for classroom practice, homeschool learning, independent homework, and standardized test preparation. Available in both print-ready PDF and editable DOCX formats.

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 4 Math worksheet provides structured practice on 4.129 Solve Perimeter Word Problems Including Unknown Sides. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Given a perimeter word problem with a missing side, select the value of the missing side length. (CCSS 4.MD.A.3; FL B.E.S.T. MA.4.GR.2.1)

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Grade 4

Subject

Math

Domain

Math Curriculum

Formats

PDF & DOCX

Sample Practice Problems

Preview the types of problems and questions covered in this worksheet

Below are sample questions representative of the exercises included on this worksheet and related 4.129 Solve Perimeter Word Problems Including Unknown Sides skill assessments:

Problem 1Difficulty: Mastery

A 7-sided classroom display border has 7 sides. Two sides are equal in length. The perimeter is 141 cm. The other sides measure 22 cm, 18 cm, 20 cm, 15 cm, 16 cm. What is the length of one of the equal sides (in cm)?

Solution & Explanation:First add the sides that are not equal: 91. Subtract from the perimeter: 141 − 91 = 50. That remaining distance is split equally between 2 sides: 50 ÷ 2 = 25.

Problem 2Difficulty: Mastery

A 6-sided pool deck outline has 6 sides. Two sides are equal in length. The perimeter is 68 m. The other sides measure 10 m, 12 m, 9 m, 13 m. What is the length of one of the equal sides (in meters)?

Solution & Explanation:First add the sides that are not equal: 44. Subtract from the perimeter: 68 − 44 = 24. That remaining distance is split equally between 2 sides: 24 ÷ 2 = 12.

Problem 3Difficulty: Mastery

A 5-sided hiking trail loop has 5 sides. Two sides are equal in length. The perimeter is 53 m. The other sides measure 9 m, 11 m, 12 m. What is the length of one of the equal sides (in meters)?

Solution & Explanation:First add the sides that are not equal: 32. Subtract from the perimeter: 53 − 32 = 21. That remaining distance is split equally between 2 sides: 21 ÷ 2 = 10.5.

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Frequently Asked Questions

Common questions about printing, using, and solving this worksheet

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QIs this 4.129 Solve Perimeter Word Problems Including Unknown Sides worksheet free for teachers and homeschoolers?

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QCan students practice 4.129 Solve Perimeter Word Problems Including Unknown Sides online with instant feedback?

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Grade 4 Math students. It aligns with educational standard 4.129 (Solve Perimeter Word Problems Including Unknown Sides).