
A city of towers
In this town, houses are built with one room for each person. There are some families of seven people living in the town. In how many different ways can they build their houses?

Matching triangles
Can you sort these triangles into three different families and explain how you did it?



What's happening?
Shapes are added to other shapes. Can you see what is happening? What is the rule?


Triangle or no triangle?
Here is a selection of different shapes. Can you work out which ones are triangles, and why?

Let's investigate triangles
Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?

Colouring triangles
Explore ways of colouring this set of triangles. Can you make symmetrical patterns?

Chain of changes
In this activity, shapes can be arranged by changing either the colour or the shape each time. Can you find a way to do it?

Hundred square
A hundred square has been printed on both sides of a piece of paper. What is on the back of 100? 58? 23? 19?

Caterpillars
These caterpillars have 16 parts. What different shapes do they make if each part lies in the small squares of a 4 by 4 square?

Olympic rings
Can you design your own version of the Olympic rings, using interlocking squares instead of circles?


Three squares
What is the greatest number of squares you can make by overlapping three squares?

Square corners
What is the greatest number of counters you can place on the grid below without four of them lying at the corners of a square?

Transformations on a pegboard
How would you move the bands on the pegboard to alter these shapes?

Nine-pin triangles
How many different triangles can you make on a circular pegboard that has nine pegs?

Treasure hunt
Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?

The numbers give the design
Make new patterns from simple turning instructions. You can have a go using pencil and paper or with a floor robot.

Name that triangle!
Can you sketch triangles that fit in the cells in this grid? Which ones are impossible? How do you know?

Bracelets
Investigate the different shaped bracelets you could make from 18 different spherical beads. How do they compare if you use 24 beads?

Shapes on the playground
Sally and Ben were drawing shapes in chalk on the school playground. Can you work out what shapes each of them drew using the clues?

Overlaps
What does the overlap of these two shapes look like? Try picturing it in your head and then use some cut-out shapes to test your prediction.

Overlapping again
What shape is the overlap when you slide one of these shapes half way across another? Can you picture it in your head? Use the interactivity to check your visualisation.

Eight hidden squares
On the graph there are 28 marked points. These points all mark the vertices (corners) of eight hidden squares. Can you find the eight hidden squares?


Cut it out
Can you dissect an equilateral triangle into 6 smaller ones? What number of smaller equilateral triangles is it NOT possible to dissect a larger equilateral triangle into?

Ten hidden squares
These points all mark the vertices (corners) of ten hidden squares. Can you find the 10 hidden squares?

Olympic turns
This task looks at the different turns involved in different Olympic sports as a way of exploring the mathematics of turns and angles.

Making spirals
Can you make a spiral for yourself? Explore some different ways to create your own spiral pattern and explore differences between different spirals.