P is a point at a distance of 13 cm from O. (a) Firstly, draw a circle of radius 5 cm having centre O. Then, the area of the quadrilateral PQOR is We know that, diameter subtends an angle 90° at the circle.įrom a point P which is at a distance of 13 cm from the centre 0 of a circle of radius 5 cm, the pair of tangents PQ and PR to the circle is drawn.

If AT is the tangent to the circle at the point A, then ∠BAT is equal to In figure, AB is a chord of the circle and AOC is its diameter such that ∠ACB = 50°. (d) We know that, the opposite sides of a quadrilateral circumscribing a circle subtend supplementary angles at the centre of the circle. In figure, if ∠AOB = 125°, then ∠COD is equal to Now, we draw a chord AC of circle C 2, which touches the circle C 1 at B.Īlso, join OB, which is perpendicular to AC. (b) Let 0 be the centre of two concentric circles C 1 and C 2, whose radii are r 1 = 4 cm and r 2 = 5 cm. If radii of two concentric circles are 4 cm and 5 cm, then length of each chord of one circle which is tangent to the other circle, is NCERT Exemplar Problems Class 10 Maths Solutions Chapter 9 CirclesĮxercise 9.1 Multiple Choice Questions (MCQs)

Hexagon ab class b