20 questions
3rd - 3rd Grade
Mathematics
Area of Irregular Figures is a Grade 3 mathematics worksheet that develops students’ ability to find the area of irregular and composite figures from labeled diagrams. Students interpret side lengths, calculate areas of whole and composite shapes, determine the area of shaded regions, and identify a missing measurement. The worksheet also includes polygon and composite-figure perimeter questions, helping students apply measurement skills to related two-dimensional figures. The 20-question set contains 18 multiple-choice items and 2 fill-in-the-blank items. Its varied prompts give students practice selecting appropriate measurements, using square units for area, and adding side lengths for perimeter. This free printable worksheet is useful for independent practice, review, homework, or a quick Grade 3 assessment. A complete answer key is included so teachers can check student work efficiently and address errors in calculating area, perimeter, or missing dimensions.
Worksheet settings
Font size
WorksheetsAnswer Key6 km
80 cm2
41 in sq
24 square centimeters
152
54 square cm
36 cm squared
76 mi
44 cm
3 cm
7 ft
This Grade 3 worksheet practices finding the area of irregular, composite, and shaded figures from labeled diagrams, including items that require identifying a side length or missing measurement. It also includes polygon and composite-figure perimeter questions, using 18 multiple-choice items and 2 fill-in-the-blank items to build accuracy with area and perimeter calculations.
First model how to read the labeled side lengths and identify the measurements needed for each figure. Then have students solve the area and shaded-region items, explaining how they combined parts of a composite shape, before using the missing-measurement and perimeter items to connect dimensions with the final calculation.
Watch for students confusing area with perimeter, adding outer side lengths when an area calculation is required, or using linear units instead of square units for area. Students may also overlook a labeled or missing side measurement, misread the shaded region, or select a perimeter option without adding every side of the polygon.
You can assign the worksheet as a printable PDF or as a digital quiz on Wayground. It includes a complete answer key, and printable submissions can be graded by scanning student work with the Wayground for Teachers app. The printable format also offers an option for schools working to reduce screen time.
The worksheet places area problems for irregular, composite, and shaded figures alongside perimeter questions for polygons and composite figures. This contrast gives students practice deciding whether to measure the space inside a figure or add the lengths around its boundary, while choosing square units for area and linear units for perimeter.
Wayground offers a comprehensive collection of free printable worksheets and practice problems across all subjects, with downloadable PDFs and answer keys to support essential skills and concepts. Browse more resources at https://wayground.com/en-us/worksheets.
