This easy worksheet helps third graders sort out perimeter from area using shapes they can picture. In Part A, students fix wrong sentences like a 7 cm by 2 cm rectangle that should have a perimeter of 18 cm, and a definition that mixes up area with distance around. Part B fills in numbers for a 9 cm by 3 cm rectangle's perimeter and a 6 cm square's area.
Part C decides true or false on whether a 3 cm square has a 12 cm perimeter and whether area uses square units. By the end, students know which formula and unit each question needs.
Style:
Perimeter and Area
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
A rectangle with sides 7 cm and 2 cm has a perimeter of 14 cm.
Rewrite: A rectangle with sides 7 cm and 2 cm has a perimeter of 18 cm.
2. Fix the sentence:
A rectangle that is 6 units long and 3 units wide has an area of 9 square units.
Rewrite: A rectangle that is 6 units long and 3 units wide has an area of 18 square units.
3. Fix the sentence:
Area is the distance around the outside of a shape.
Rewrite: Area is the space inside a shape.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. A rectangle is 9 cm long and 3 cm wide. Its perimeter is 24 cm.
2. A square with sides of 6 cm has an area of 36 square cm.
3. To find the area of a rectangle, you multiply the length by the width.
4. A rectangle is 4 m long and 7 m wide. Its area is 28 square m.
Part C: True or False?
Read each statement. Circle True or False.
1. A square with 3 cm sides has a perimeter of 12 cm.
True False
2. A rectangle that is 5 cm by 4 cm has an area of 9 square cm.
True False
3. Area is measured in square units.
True False
Perimeter and Area
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
A rectangle with sides 7 cm and 2 cm has a perimeter of 14 cm.
Rewrite: A rectangle with sides 7 cm and 2 cm has a perimeter of 18 cm.
2) Fix the sentence:
A rectangle that is 6 units long and 3 units wide has an area of 9 square units.
Rewrite: A rectangle that is 6 units long and 3 units wide has an area of 18 square units.
3) Fix the sentence:
Area is the distance around the outside of a shape.
Rewrite: Area is the space inside a shape.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) A rectangle is 9 cm long and 3 cm wide. Its perimeter is 24 cm.
2) A square with sides of 6 cm has an area of 36 square cm.
3) To find the area of a rectangle, you multiply the length by the width.
4) A rectangle is 4 m long and 7 m wide. Its area is 28 square m.
★ Part C: True or False?
Read each statement. Circle True or False.
1) A square with 3 cm sides has a perimeter of 12 cm.
True
False
2) A rectangle that is 5 cm by 4 cm has an area of 9 square cm.
True
False
3) Area is measured in square units.
True
False
Ready to Practice?
Complete each section carefully.
10 Questions
15-20 minutes
Auto-graded
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