WALT: To calculate the perimeter of shapes using doubling and adding
Scampi and George are exploring an enormous mansion. They explore every room and begin by scampering all the
way around the perimeter of each room. Find out what the perimeter of each room is, that they explore.
5m
2.
1.
4m
6m
3.
2m
4m
4.
2m
12m
2m
9m
7.
8m
5m
6.
5.
3m
7m
5m
8.
25m
15m
NOW: Measure 2 sides of these rectangles and then calculate the perimeter of them
9.
11
.
10
.
12
10
.
.
13
.
WALT: To calculate the perimeter of shapes using doubling and adding (c)
Scampi and George are exploring an enormous mansion. They explore every room and begin by scampering all the
way around the perimeter of each room. Find out what the perimeter of each room is, that they explore.
8m
2.
1.
4m
6m
3.
3m
4.5m
4.
3.5m
3m
6.
5.
12.5m
2.5m
9.5m
7.
8.5m
9m
4.5m
8.
26m
16m
NOW: Measure 2 sides of these rectangles and then calculate the perimeter of them
10
.
9.
11
.
12
10
.
.
13
.
5.5m