Find the length of a chord 3cm from the centre of a circl...
Find the length of a chord 3cm from the centre of a circle of radius 5cm
8cm
5.6cm
7cm
6.5cm
Correct answer is A
Using pythagoras formula:
Hyp2 = adj2 + opp2
52 = opp2 + 32
52 - 32 = adj2
4 = adj
length of the chord = 2 * 4 = 8cm
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