waecmaths question:
A chord of length 6cm is drawn in a circle of radius 5cm. Find the distance of the chord from the centre of the circle
Option A:
2.5cm
Option B:
3.0cm
Option C:
3.5cm
Option D:
4.0cm
waecmaths solution:
OD is the perpendicular of AB. Therefore AD = DB = 3cm
$\left| OD \right|=\sqrt{{{5}^{2}}-{{3}^{2}}}=\sqrt{16}=4cm$
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