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Students learn to distinguish perimeter from area through three section types. Part A asks them to fix three sentences containing errors such as wrong perimeter totals and incorrect units. Part B has four fill-in-the-blank problems calculating the perimeter of a rectangle and the area of a rectangle in square units. Part C presents three true-or-false statements checking both calculations and unit types.

This sheet builds the habit of attaching the right unit — linear for perimeter and square for area.

Style:
Busy Bee
Perimeter and Area
Grade 3
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
A rectangle with sides 5 cm and 3 cm has a perimeter of 15 cm.
Rewrite: A rectangle with sides 5 cm and 3 cm has a perimeter of 16 cm.
2) Fix the sentence:
A rectangle that is 4 units long and 2 units wide has an area of 6 square units.
Rewrite: A rectangle that is 4 units long and 2 units wide has an area of 8 square units.
3) Fix the sentence:
The perimeter of a shape is measured in square centimeters.
Rewrite: The perimeter of a shape is measured in centimeters.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) A rectangle has sides of 6 cm and 4 cm. Its perimeter is 20 cm.
2) A rectangle is 3 units long and 5 units wide. Its area is 15 square units.
3) To find the perimeter of a shape, you add all the side lengths.
4) A square with sides of 7 cm has a perimeter of 28 cm.
★ Part C: True or False?
Read each statement. Circle True or False.
1) A rectangle that is 6 units long and 3 units wide has an area of 18 square units.
True
False
2) Perimeter is measured in square units.
True
False
3) A rectangle with sides 2 cm and 5 cm has a perimeter of 14 cm.
True
False
🎯

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Complete each section carefully.

10 Questions
15-20 minutes
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