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Clock Hands

This investigation explores using different shapes as the hands of the clock. What things occur as the the hands move.

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Watch the Clock

During the third hour after midnight the hands on a clock point in the same direction (so one hand is over the top of the other). At what time, to the nearest second, does this happen?

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Estimating Angles

How good are you at estimating angles?

Take the Right Angle

Age 7 to 11 Challenge Level:

How many times in twelve hours do the hands of a clock form a right angle? Use the + and - buttons below to move the hands of the NRICH clock, then click on the right angle symbol to check your answer.
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What are these times to the nearest minute?