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Equal Equilateral Triangles

Using the interactivity, can you make a regular hexagon from yellow triangles the same size as a regular hexagon made from green triangles ?

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The Square Hole

If the yellow equilateral triangle is taken as the unit for area, what size is the hole ?

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An Introduction to Irrational Numbers

Tim Rowland introduces irrational numbers

Rationals Between...

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

If you are walking along a number line, how far apart are the thirds, quarters, fifths... hundredths?