Question 15

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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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