NCERT Mathematics Class 10 Exemplar Ch 9 Circles Part 1
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EXERCISE 9.1
1. If radii of two concentric circles are 4 cm and 5 cm, then the length of each chord of one circle which is tangent to the other circle is
(A) (B) (C) (D)
Answer: B
2. In Fig. 9.3, if then ∠COD is equal to
If ∠AOB = 125°, then ∠COD
(A) 62.5°
(B) 45°
(C) 35°
(D) 55°
Answer: D
3. In Fig. 9.4, AB is a chord of the circle and AOC is its diameter such that If AT is the tangent to the circle at the point A, then ∠BAT is equal to
AB is a Chord of the Circle and AOC is Its Diameter
(A) 65°
(B) 60°
(C) 50°
(D) 40°
Answer: C
4. From a point P which is at a distance of 13 cm from the centre O of a circle of radius 5 cm, the pair of tangents PQ and PR to the circle are drawn. Then the area of the quadrilateral PQOR is
(A) (B) (C) (D)
Answer: A
5. At one end A of a diameter AB of a circle of radius 5 cm, tangent XAY is drawn to the circle. The length of the chord CD parallel to XY and at a distance 8 cm from A is
A of a Diameter AB of a Circle of Radius 5 Cm
(A)
(B)
(C)
(D)
Answer: D