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Building Tetrahedra

Can you make a tetrahedron whose faces all have the same perimeter?

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Ladder and Cube

A 1 metre cube has one face on the ground and one face against a wall. A 4 metre ladder leans against the wall and just touches the cube. How high is the top of the ladder above the ground?

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Areas and Ratios

What is the area of the quadrilateral APOQ? Working on the building blocks will give you some insights that may help you to work it out.

Efficient Cutting Poster

Stage: 4 Challenge Level: Challenge Level:2 Challenge Level:2

This poster is based on the problem Efficient Cutting.

The poster is available as a pdf
 

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This poster is also available as an image file by clicking here.