Perimeter and Area — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. A rectangle is 9 cm long and 4 cm wide. What is its area?
A) 13 square cm
B) 26 square cm
C) 36 square cm
D) 32 square cm
B is correct because area = 6 × 6 = 36 square cm.
2. What is the perimeter of a rectangle with sides 8 m and 5 m?
A) 40 m
B) 13 m
C) 21 m
D) 26 m
C is correct because perimeter = 7 + 6 + 7 + 6 = 26 m.
3. Two rectangles both have a perimeter of 24 cm. Which could have the greater area?
A) 1 cm × 11 cm
B) 2 cm × 10 cm
C) 3 cm × 9 cm
D) 5 cm × 7 cm
B is correct because 5 × 7 = 35 square cm.
4. Which unit is used to measure area?
A) centimeters
B) meters
C) square meters
D) inches
C is correct because area is measured in square units, such as square meters.
Part B: Fill in the Blank
Write the correct answer on each line.
1. A square with 7 m sides has an area of 49 square m.
Area = 7 × 7 = 49 square cm.
2. A rectangle 6 cm by 3 cm has a perimeter of 18 cm.
Perimeter = 6 + 3 + 6 + 3 = 18 cm.
3. A garden is 10 feet long and 5 feet wide. Its area is 50 square feet.
Area = 10 × 5 = 50 square cm.
4. A rectangle with sides 12 m and 4 m has a perimeter of 32 m.
Perimeter = 12 + 4 + 12 + 4 = 32 cm.
5. A square playground has 8 m sides. Its area is 64 square m.
Area = 8 × 8 = 64 square cm.