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3rd Grade Area of Irregular Shapes - Printable Mathematics Worksheets - Wayground

3rd Grade Area of Irregular Shapes

10 questions

3rd - 3rd Grade

Mathematics

3rd Grade Area of Irregular Shapes is a mathematics worksheet that helps students find the area of irregular figures, rectangles, and shaded models shown in diagrams. Across 10 multiple-choice questions, students determine total area, select answers expressed in square units, and distinguish appropriate area measurements such as square feet, square inches, and square centimeters from incorrect linear units. Designed for Grade 3 instruction, independent practice, review, or a quick check for understanding, this worksheet gives students repeated opportunities to interpret visual measurements and compare possible area calculations. It is a free printable worksheet with a complete answer key, making it easy to use for classroom practice, homework, or assessment preparation.

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3rd Grade Area of Irregular Shapes

Total questions: 10

Name
Class
Date
1.

What is the area of this irregular shape?

a)

121 sq. ft.

b)

40 s. ft.

c)

131 sq. ft.

d)

48 sq. ft.

2.
a)
18 square ft
b)
9 square feet
c)
10 square ft
d)
3 square ft
3.
Find the Area?
a)
27 in2
b)
36 in2
c)
18 in2
d)
I have no idea
4.
Find the AREA of this figure.
a)
160 square feet
b)
161 feet
c)
106
d)
1600 feet
5.
What is the area of this shape?
a)
54 cm2
b)
45 cm2
c)
63 cm2
d)
36 cm2
6.
What is the area of this shape?
a)
54 cm2
b)
45 cm2
c)
63 cm2
d)
36 cm2
7.
Find area of the shape.
a)
18
b)
45
c)
63
d)
27
8.
What is the total area of the shaded model?
a)
5
b)
35
c)
39
d)
41
9.

Find the area of the shape.

a)

93 in2

b)

95 in2

c)

103 in2

d)

143 in2

10.
What is the area of the rectangle?
a)
15 sq cm
b)
15 cm
c)
2 
d)
16 cm
Answer Key

3rd Grade Area of Irregular Shapes

Total questions: 10

1.
c)

131 sq. ft.

2.
a) 18 square ft
3.
a) 27 in2
4.
a) 160 square feet
5.
a) 54 cm2
6.
a) 54 cm2
7.
c) 63
8.
c) 39
9.
c)

103 in2

10.
a) 15 sq cm

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FAQs

What does this Grade 3 area of irregular shapes worksheet cover?

This worksheet covers finding the area of irregular figures, rectangles, and shaded models from visual diagrams. Its 10 multiple-choice questions require students to calculate or identify total area and choose answers using appropriate square units, strengthening accuracy with area measurements.

How can I use this worksheet to teach students to find the area of irregular shapes?

Introduce the worksheet by modeling how to read the measurements in an irregular-shape diagram and determine the total area before looking at the answer choices. Have students explain why an answer such as square feet, square inches, or square centimeters is appropriate, then use the multiple-choice items for guided practice before assigning the remaining questions independently.

What mistakes should I watch for when students complete this area worksheet?

Watch for students choosing a linear unit, such as feet or centimeters, instead of a square unit when reporting area; several answer choices are designed to reveal this confusion. Also check whether students correctly combine the parts represented in shaded or irregular figures and avoid selecting a plausible-looking number without verifying the total area.

How do I assign and grade this area of irregular shapes worksheet?

On Wayground, you can assign this worksheet as a printable PDF or as a digital quiz, and it includes a complete answer key for checking the 10 multiple-choice responses. Printable submissions can also be graded by scanning student work with the Wayground for Teachers app.

How can I differentiate this irregular-shapes area worksheet for my students?

Use the worksheet’s Advanced Settings to adjust font spacing or choose a larger font size so the diagrams, measurements, and multiple-choice options are easier to read. You can also enable a dyslexia-friendly font or translate the worksheet into another language when those file-level options support access to the area questions.

Where can I find more free worksheets like this on Wayground?

Wayground offers a comprehensive collection of free printable worksheets and practice problems across all subjects, including downloadable PDFs and answer keys to support essential skills and concepts. Browse more resources at https://wayground.com/en-us/worksheets.

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