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Kite

Derive a formula for finding the area of any kite.

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The Pi Are Square

A circle with the radius of 2.2 centimetres is drawn touching the sides of a square. What area of the square is NOT covered by the circle?

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The Moving Planets

Mathematics has always been a powerful tool for studying, measuring and calculating the movements of the planets, and this article gives several examples.

Right Time

Stage: 3 Challenge Level: Challenge Level:2 Challenge Level:2

At the time of writing the hour and minute hands of my clock are at right angles. How long will it be before they are at right angles again?