Remember: Add every side to find the perimeter. Work back from the perimeter to find a missing side. Shapes with the same area can have different perimeters.
Find the way round
1
A pool is 15 meters long and 8 meters wide. How many meters all the way round?
2
A square sign has sides of 12 inches. How many inches all the way round?
3
All the way round the triangle is 21 cm. Two sides are labeled. How long is the third side?
4
Each square is 1 inch. How many inches all the way round the staircase?
5
Each square is 1 meter. How many meters all the way round the L shaped deck?
6
The perimeter of the rectangle is 24 units. One side is 8 units. How long is the side next to it?
Same area, same way round?
7
Which rectangle has a perimeter of 16 units?
ABC
8
A 1 by 8 strip of squares and a 2 by 4 rectangle both hold 8 squares. How many more units go round the strip?
9
Both shapes have the same perimeter.
TrueFalse
10
Which also finds the perimeter of this rectangle?
9 × 52 × 9 + 2 × 59 + 5
11
A garden is 14 m long and 6 m wide. A fence goes all the way round it, but a gate 2 m wide has no fence. How many meters of fence?
12
Draw two different rectangles that each have a perimeter of 12 units.
13
Both shapes hold 9 squares. Write how you know the 1 by 9 strip has the longer way round.
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