NCERT Mathematics Class 9 Exemplar Ch 10 Circles Part 3

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8. ABCD is a cyclic quadrilateral such that AB is a diameter of the circle circumscribing it and , then is equal to:

(A)

(B)

(C)

(D)

Answer: B

9. In Fig. 10.8, BC is a diameter of the circle and Then is equal to:

(A)

(B)

(C)

(D)

BC is a diameter of the circle and ∠BAO = 60º

BC is a Diameter of the Circle and ∠BAO = 60º

BC is a diameter of the circle and ∠BAO = 60º

Answer: C

10. In Fig. 10.9, and , then is equal to:

(A)

(B)

(C)

∠AOB = 90º and ∠ABC = 30º

∠AOB = 90º and ∠ABC = 30º

∠AOB = 90º and ∠ABC = 30º

(D)

Answer: D

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