This shape is an equilateral triangle sitting on top of a square.
What is the radius of the circle that circumscribes the shape?
Click here for a hint if you need one to get started.
Where are the mirror lines (lines of symmetry)?
Which of your patterns also have rotational symmetry?
What do you notice about this shape?
Describe the shapes of the tangram pieces.
What is the same and what is different about the shapes of the tangram pieces?
Make a pattern of your own using all 7 pieces.
Fold a piece of paper in two and tear out half a person. An old newspaper is good for this. Now open out your little person and flatten it. You have made a paper doll that is symmetrical about the fold line. The two halves of the doll on […]
This month we have a link to an Advent Calendar on the NRICH website which gives you a mathematical game when you click on any day in December up to Christmas Eve.
Some of the games you can play on the computer but for many of them do not need a […]
How many faces, edges and vertices does a cube have?
You might like to copy the diagram onto squared paper to help you with this problem.
Reflect the flag in the left-hand mirror line, and then reflect the image you obtain in the right-hand mirror line. Can you describe the single transformation that takes the first flag to the last flag?
Click here to download a sheet so you can cut out your own pieces and try different arrangements.
The first of these examples shows a symmetrical arrangement, the second […]
What are the similarities and differences between the patterns?
Diagram B is unchanged when you rotate […]