Finding the perimeter of a rectilinear shape
Learn how to find the perimeter of a rectilinear shape.
- a quiz
- a learning summary
- one video
- one activity
To get started, let's see how well you know this topic already. Take the quiz below to find out.
A rectilinear shape is a shape that has straight sides and right angles. It can look like two rectangles that have been joined together.
This shape looks much more complicated than a rectangle, but the method of working out the perimeter is exactly the same.
Add together the lengths of all the sides to find it.
2 + 2 + 3 + 3 + 5 + 5 = 20
The perimeter is 20 cm
Can you find the perimeter of this shape?
Work out the missing lengths of this shape to find the perimeter.
Make a shape
Cut out 12 squares of paper of equal size or use 12 square sticky notes (you may have these from yesterday's activity). Arrange them into a rectilinear shape.
What is the perimeter of this shape?
Now rearrange the pieces of paper into a new shape. How many different shapes can you make and find the perimeter of?
Play Guardians: Defenders of Mathematica to learn more and sharpen your skills on this topic.