circle lesson exam related question
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b
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Answer: (b) 2√(a²-b²)
Step-by-step explanation:
From given figure,
AB is chord on bigger circle.
OC=b
OB=a
In figure, from right angled triangle OCB,
applying Pythagorus theorem,
OC² + CB²= OB²
b² + CB²= a²
CB²=a²-b²
CB=√(a²-b²)
Length of chord= 2*CB
Length of chord= 2√(a²-b²)
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