# Maths KS2: Problem solving with equilateral triangles

At the Grecian Pizza Parlour, apprentice Ambrose receives an order for 50 equilateral triangle shaped pizzas with equilateral triangle shaped toppings.

Ambrose uses the circular base and cuts to form the equilateral triangle base explaining about the properties of the shape.

He makes tessellating toppings to cover the pizza.

Three differentiated questions then reinforce understanding of angles in a triangle, use of a protractor and introduce an investigation about fitting different triangles into a 30cm square pizza box.

This is from the series: Let's Do Maths

### Teacher Notes

Show the children three different triangles and get them to explain which is the odd one out and why.

This will assess their knowledge of triangles currently.

Discuss why it is easier to make pizzas round and not triangular.

Write down the words: sides, angles, lines of symmetry, tessellation.

Can the children use any of these words in a description about an equilateral triangle?

Watch the clip as inspiration for how triangles can be used in different designs.

Look at work artists have done using equilateral triangles and get the children to generate their own artwork using these.

To further the children, you could get them to use a protractor to measure the angles of the shapes.

### Curriculum Notes

This clip will be relevant for teaching Maths at KS2 in England and Wales, Second Level in Scotland and KS1 and KS2 in Northern Ireland.