In a circle of radius 10 cm and centre O, PQ and PR are two equal chords, each of length 12 cm. What is the length of chord QR?

In a circle of radius 10 cm and centre O, PQ and PR are two equal chor

1.	In a circle of radius 10 cm and centre O, PQ and PR are two equal chords, each of length 12 cm. What is the length of chord QR?
A.	18.6
B.	18.4
C.	19.2
D.	20.4
Answer» D. 20.4

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In a circle of radius 10 cm and centre O, PQ and PR are two equal chords, each of length 12 cm. What is the length of chord QR?

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