**"Length"**

## Tangram Fractions

*By toni On 26 March, 2021 · 4 Comments*

This is a classic Chinese Tangram. Each of the people illustrated, and many convex polygons, can be made with the 7 pieces and there are hundreds of other puzzles based on this tangram.

Can you find a way to fold a sheet of paper so that you can cut out the tangram pieces accurately […]

## Sierpinski Number and Shape Patterns

*By toni On 16 November, 2020 · 2 Comments*

There are many investigations and projects you could do based on the Sierpinski Tetrahedron.

For a start: how many small tetrahedra, like the blue model shown, were used to make the 6.5 metre high red balloon model shown below.

The smallest tetrahedron (Stage 0), the blue model, is made from 6 balloons, each […]

## Rod Measures

*By toni On 5 May, 2020 · Leave a Comment*

Using 3 rods of lengths from 1 to 10 units, and not using any rod more than once, you can measure all the lengths in whole units from 1 to 10 units.

For example with rods of lengths 3, 4, and 9 the measurements are:

4 – 3 = 1; 9 – 4 […]

## Metre Measures

*By toni On 18 April, 2020 · Leave a Comment*

For this activity you need lots of old newspapers, and some sticky tape.

Make 1 metre length sticks using newspaper.

Tightly roll 8 large sheets of newspaper, 4 and 4 placed as in the photograph, so that the length of the stick when the paper is […]

## Fractions in a Square

*By toni On 18 April, 2020 · 4 Comments*

Squares 1, 2 and 3 all have edges of length 1 unit.

The top edge of square 2 is split into equal parts of length ½.

The left hand edge of square 3 is split into equal parts of length ½.

The top and bottom edges of square 3 is split into lengths ¼, […]

This baobab tree in Senegal is reported to be 6000 years old.

Try to estimate the distance around the tree trunk at its base measured in metres.

Does this picture give you an idea how you might use the picture, with your class at school, to work out a better estimate […]

## Handspan, Pace

*By toni On 17 April, 2020 · Leave a Comment*

Let’s walk from here to that tree,

How many paces will that be?

Spread your fingers as wide as you can,

What you have now is called a hand span .

A hand span can help you to find out how big

Is the height of a cow, a […]

## Muggles Magic

*By toni On 4 April, 2020 · 5 Comments*

If you move the 4 pieces of this jigsaw around they will fit into both outlines. One square unit has been removed in the lower shape.

You might like to cut out the pieces from the Muggles Magic Learner Worksheet and try this for yourself.

Click here for the […]

## Cola Can

*By toni On 18 February, 2016 · Leave a Comment*

An aluminium can contains 330 ml of cola.

If the can’s diameter is 6 cm what is the can’s height?

Suppose the can’s height is 10 cm, what does the diameter have to be?

Which of these two cans uses the least aluminium?

If you could choose any diameter which dimensions for the can […]

Each picture shows 3 similar triangles.

They are called similar because they are the same shape, they have the same angles and the lengths of the edges are in the same ratio. For example in this diagram the edges in each triangle are all in the ratio 2 : 3 : 4 […]

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