Question 24

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waecmaths question: 

A chord 7cm long, is drawn in a circle with radius 3.7cm. Calculate the distance of the chord from the centre of the circle

Option A: 

0.7cm

Option B: 

1.2cm

Option C: 

2.0cm

Option D: 

2.5cm

waecmaths solution: 

$\begin{align}  & \left| OD \right|\text{ is the }\bot ar\text{ bisector of }\left| AB \right| \\ & \left| OD \right|=\sqrt{{{3.7}^{2}}-{{3.5}^{2}}}=\sqrt{1.44}=1.2 \\\end{align}$

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