Perimeter of a rectangle
Name: _____________________ Date: __________
Show your thinking with numbers, words, or a drawing.
1. A rectangle is 6 cm long and 5 cm wide. What is its perimeter (in cm)?
2. A rectangle is 7 cm long and 6 cm wide. What is its perimeter (in cm)?
3. A rectangle is 7 cm long and 4 cm wide. What is its perimeter (in cm)?
4. A rectangle is 7 cm long and 5 cm wide. What is its perimeter (in cm)?
5. A rectangle is 4 cm long and 3 cm wide. What is its perimeter (in cm)?
Answer key · Perimeter of a rectangle
1. 22
Perimeter is the distance around all four sides: 6 + 5 + 6 + 5.
P = 2 × (6 + 5) = 2 × 11 = 22 cm.
2. 26
Perimeter is the distance around all four sides: 7 + 6 + 7 + 6.
P = 2 × (7 + 6) = 2 × 13 = 26 cm.
3. 22
Perimeter is the distance around all four sides: 7 + 4 + 7 + 4.
P = 2 × (7 + 4) = 2 × 11 = 22 cm.
4. 24
Perimeter is the distance around all four sides: 7 + 5 + 7 + 5.
P = 2 × (7 + 5) = 2 × 12 = 24 cm.
5. 14
Perimeter is the distance around all four sides: 4 + 3 + 4 + 3.
P = 2 × (4 + 3) = 2 × 7 = 14 cm.
Try it together
Choose three objects at home. Estimate their measurements, then check together and explain the differences.