How many different symmetrical shapes can you make by shading triangles or squares?
Someone at the top of a hill sends a message in semaphore to a
friend in the valley. A person in the valley behind also sees the
same message. What is it?
What is the missing symbol? Can you decode this in a similar way?
Use the clues about the symmetrical properties of these letters to
place them on the grid.
Use the blue spot to help you move the yellow spot from one star to
the other. How are the trails of the blue and yellow spots related?
Can you place the blocks so that you see the relection in the picture?
Systematically explore the range of symmetric designs that can be
created by shading parts of the motif below. Use normal square
lattice paper to record your results.
Can you make the green spot travel through the tube by moving the
yellow spot? Could you draw a tube that both spots would follow?
Each of these solids is made up with 3 squares and a triangle around each vertex. Each has a total of 18 square faces and 8 faces that are equilateral triangles. How many faces, edges and vertices. . . .
Look carefully at the video of a tangle and explain what's
Can you recreate this Indian screen pattern? Can you make up
similar patterns of your own?
This problem explores the shapes and symmetries in some national flags.
These images are taken from the Topkapi Palace in Istanbul, Turkey.
Can you work out the basic unit that makes up each pattern? Can you
continue the pattern? Can you see any similarities and. . . .
Can all but one square of an 8 by 8 Chessboard be covered by
What is the same and what is different about these tiling patterns and how do they contribute to the floor as a whole?
What mathematical words can be used to describe this floor
covering? How many different shapes can you see inside this
Find the missing coordinates which will form these eight
quadrilaterals. These coordinates themselves will then form a shape
with rotational and line symmetry.
Some local pupils lost a geometric opportunity recently as they surveyed the cars in the car park. Did you know that car tyres, and the wheels that they on, are a rich source of geometry?
This activity investigates how you might make squares and pentominoes from Polydron.
Follow these instructions to make a five-pointed snowflake from a
square of paper.
It's hard to make a snowflake with six perfect lines of symmetry,
but it's fun to try!
Here is a chance to create some attractive images by rotating
shapes through multiples of 90 degrees, or 30 degrees, or 72
This interactivity allows you to sort letters of the alphabet into two groups according to different properties.
Use the information on these cards to draw the shape that is being described.
Can you describe what happens in this film?
When dice land edge-up, we usually roll again. But what if we
In how many ways can you fit all three pieces together to make
shapes with line symmetry?
A red square and a blue square overlap so that the corner of the red square rests on the centre of the blue square. Show that, whatever the orientation of the red square, it covers a quarter of the. . . .
A gallery of beautiful photos of cast ironwork friezes in Australia with a mathematical discussion of the classification of frieze patterns.
Plex lets you specify a mapping between points and their images.
Then you can draw and see the transformed image.
Patterns that repeat in a line are strangely interesting. How many types are there and how do you tell one type from another?
Mathematics is the study of patterns. Studying pattern is an
opportunity to observe, hypothesise, experiment, discover and
This practical problem challenges you to create shapes and patterns
with two different types of triangle. You could even try
Here is a chance to create some Celtic knots and explore the mathematics behind them.
Proofs that there are only seven frieze patterns involve complicated group theory. The symmetries of a cylinder provide an easier approach.
Use the interactivity to create some steady rhythms. How could you
create a rhythm which sounds the same forwards as it does
Can you deduce the pattern that has been used to lay out these
This practical problem challenges you to make quadrilaterals with a loop of string. You'll need some friends to help!
Using the 8 dominoes make a square where each of the columns and rows adds up to 8
Place the numbers 1, 2, 3,..., 9 one on each square of a 3 by 3 grid so that all the rows and columns add up to a prime number. How many different solutions can you find?
Scheduling games is a little more challenging than one might desire. Here are some tournament formats that sport schedulers use.
An article for students and teachers on symmetry and square dancing. What do the symmetries of the square have to do with a dos-e-dos or a swing? Find out more?
Are these statements always true, sometimes true or never true?
Toni Beardon has chosen this article introducing a rich area for
practical exploration and discovery in 3D geometry
Create a symmetrical fabric design based on a flower motif - and realise it in Logo.