Draw a circle of radius \( 4 \mathrm{~cm} \). Mark its centre as \( \mathrm{O} \). Mark a point ...

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Draw a circle of radius \( 4 \mathrm{~cm} \). Mark its centre as \( \mathrm{O} \).
Mark a point \( \mathrm{P} \) such that \( \mathrm{OP}=5 \mathrm{~cm} \). Using a ruler
and a compass, construct two tangents from \( \mathrm{P} \) to the circle. Measure the length of one of them.
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