Perimeter of composite shapes
Name: _____________________ Date: __________
Show your thinking with numbers, words, or a drawing.
1. What is the perimeter of this shape, in metres? All the corners are right angles.
2. What is the perimeter of this shape, in metres? All the corners are right angles.
3. What is the perimeter of this shape, in metres? All the corners are right angles.
4. What is the perimeter of this shape, in metres? All the corners are right angles.
5. What is the perimeter of this shape, in metres? All the corners are right angles.
Answer key ยท Perimeter of composite shapes
1. 40
Start at one corner and add every side as you go round.
6 + 4 + 6 + 4 + 12 + 8 = 40
The perimeter is 40 m.
2. 44
Start at one corner and add every side as you go round.
7 + 7 + 6 + 2 + 13 + 9 = 44
The perimeter is 44 m.
3. 44
Start at one corner and add every side as you go round.
4 + 2 + 10 + 6 + 14 + 8 = 44
The perimeter is 44 m.
4. 40
Start at one corner and add every side as you go round.
9 + 2 + 6 + 9 + 3 + 11 = 40
The perimeter is 40 m.
5. 26
Start at one corner and add every side as you go round.
6 + 2 + 4 + 5 + 2 + 7 = 26
The perimeter is 26 m.
Try it together
Choose three objects at home. Estimate their measurements, then check together and explain the differences.