Math · Age 10 · Measurement
Perimeter of Complex Shapes (Ex. 2)
Find missing side lengths using perimeter.
Module
Measurement
Age
Age 10
Duration
10 min
Questions
5
What's in this exercise
Answers are hidden — sign up to practise and check your work.
Question 1
Multiple choice
A shape has perimeter 36 cm. Three sides are 10 cm, 8 cm, 7 cm. What is the fourth side?
Question 2
Multiple choice
A regular octagon has perimeter 40 cm. What is each side?
Question 3
Multiple choice
A rectangle has perimeter 30 cm. One side is 8 cm. What is the other side?
Question 4
Sequence
Perimeters growing by 10: 10 cm, 20 cm, 30 cm, ___ cm, 50 cm.
Question 5
True or false
A square with perimeter 20 cm has sides of 5 cm each.