Perimeter - Worksheet 4 - 3rd Grade
MediumFind the perimeter of polygons (Medium)
18 problems · 15-20 minutes · Skills: measurement, addition
About This Worksheet
This medium-level worksheet contains 18 problems designed for 3rd Grade students practicing perimeter. Medium worksheets introduce larger numbers and varied question formats to deepen understanding and build fluency.
Perimeter is a direct application of addition to geometry. It also introduces the idea of a formula — a generalized rule that works for all rectangles — which is one of the most important mathematical concepts students will encounter.
- Find the perimeter of a polygon by adding all side lengths
- Find missing side lengths when the perimeter is known
- Calculate the perimeter of rectangles using the formula P = 2l + 2w
- Distinguish between perimeter as a linear measure and area as a square measure
- Apply perimeter concepts to real-world design problems like fencing a yard
How to Solve: Worked Example
- Read the problem carefully.
- Identify what is being asked.
- Use what you know to find the answer.
- Check your work.
Answer Key
Frequently Asked Questions
How do I download this perimeter - worksheet 4 worksheet?
Click the "Download PDF / Print" button at the top of the worksheet. You can save it as a PDF or print it directly. The answer key will be on a separate page.
How do I find worksheets at different difficulty levels?
Each subtopic has 10 worksheets: Worksheets 1-3 are Easy, 4-7 are Medium, and 8-10 are Hard. Start with Easy worksheets to build confidence, then progress to harder ones.
What skills does this measurement worksheet cover?
This worksheet focuses on measurement, addition. It is designed for 3rd Grade students and provides structured practice through varied problem types with a worked example to guide students before they begin.
Can I use this worksheet in my classroom?
Yes. All worksheets on K12Worksheets are free for classroom use. You can print copies for your entire class. With 10 worksheets per subtopic at three difficulty levels, you have plenty of options for differentiated instruction and individualized practice.
How many problems are on this worksheet?
This worksheet contains 18 problems. It typically takes 15-20 minutes to complete. An answer key with all solutions is included so parents and teachers can check work quickly.