Question

find the length of a chord which is at a distance of 4 cm from the centre of a circle of radius 10cm

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Answer 1

Answer:

by pythagoras theorem

10^2 =4^2 +ac^2

100=16+ac^2

ac^2 =84

ac =√84

ac=2√21

the length of the chord is 2ac

2×2√21

4√21

Answer 2

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