1 Calculate the perimeters of these shapes.
30 cm
30 cm
15 cm
15 cm
40 cm
40 cm
25 cm
25 cm
B
B
10 cm
10 cm
28 cm
28 cm
70 cm
70 cm
40 cm
40 cm
A
A
20 cm
20 cm
C
C
20 cm
20 cm
20 cm
20 cm
80 cm
80 cm
2 Carl draws a triangle, square, pentagon and hexagon. The sides of each shape are all 6 cm. (a) Estimate which shape will have the longest perimeter. (b) Now calculate the perimeters. Were you correct? What methods did you use to help you calculate?
E
The perimeter of a square pool is 64 m. What is the length of each side of the pool? Work out the possible dimensions for a rectangular pool with the same perimeter.
140
9781380050694__text.indb 140
04/05/2022 15:51
Made with FlippingBook Learn more on our blog