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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