Perimeter Missing Side
Grade 3 Math Worksheet
Write the answer on the line, or circle the answer.
The perimeter is 35 m. Three sides are 10 m, 5 m and 5 m. How long is the missing side, in m?
The perimeter is 44 inches. Three sides are 8 inches, 15 inches and 8 inches. Which expression finds the missing side?
- 44 + (8 + 15 + 8)
- 44 - 8
- 8 + 15 + 8
- 44 - (8 + 15 + 8)
Mia uses 46 cm of ribbon to go all the way around a paper shape she cut out. Three sides are 13 cm, 8 cm and 8 cm. How long is the fourth side, in cm?
The perimeter is 27 cm. Three sides are 6 cm, 8 cm and 6 cm. How long is the missing side, in cm?
A rectangle has a perimeter of 40 m. Each long side is 11 m. How long is each short side, in m?
The perimeter is 23 inches. Three sides are 4 inches, 8 inches and 4 inches. Which expression finds the missing side?
- 23 - (4 + 8 + 4)
- 23 + (4 + 8 + 4)
- 4 + 8 + 4
- 23 - 4
The perimeter is 35 feet. Three sides are 11 feet, 6 feet and 6 feet. How long is the missing side, in feet?
The class needs 34 feet of border paper to go all the way around the reading corner. Three sides are 5 feet, 14 feet and 5 feet. How long is the fourth side, in feet?
A rectangle has a perimeter of 44 m. Each long side is 13 m. How long is each short side, in m?
The perimeter is 31 inches. Three sides are 5 inches, 12 inches and 5 inches. Which expression finds the missing side?
- 31 + (5 + 12 + 5)
- 31 - (5 + 12 + 5)
- 31 - 5
- 5 + 12 + 5