A chord is drawn 5 cm away from the centre of a... - JAMB Mathematics 2009 Question
A chord is drawn 5 cm away from the centre of a circle of radius 13 cm. Calculate the length of the chord.
A
7 cm
B
9 cm
C
12 cm
D
24 cm
correct option: c
132 = 52 + b2
169 = 25 + b2
b2 = 144
b = (\sqrt{144})
= 12 cm
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