CBSE Class 9 Mathematics Circle Assignment Set C

Refer to the attached file for assignment on Circles

Key Concepts and Assignment

* Circle - circle is locus of such points which are at equidistant from a fixed point in a plane.

* Concentric circle - Circle having same centre called concentric circle.

* Two arc of a circle called congruent if they have the same degree measure.

* If two arc equal then their corresponding chords are equal.

* The perpendicular from centre to chord of circle, it bisects the chord and converse.

* There is one and only one circle passing through three non-collinear points.

* Equal chords of circle are equidistant from centre.

* The angle subtend by an arc at the centre of circle is twice the angle which subtend at remaining part of circumference.

* Any two angles in the same segment of the circle are equal.

* Angle of semicircle is right angle.

* Equal chords of circle subtend equals angle at the centre of circle.

* If the all vertices of a quadrilateral lie on the circumference of circle then quadrilateral called cyclic.

* In a cycle quadrilateral the sum of opposite angles is 1800 and converse.

* The exterior angle of a cycle quadrilateral is equal to the opposite interior angle.

Section - A

Q.1 AD is diameter of a circle and AB is a chord If AD = 34cm, AB=30cm. The distance of AB from centre of circle is.

Click on link below to download CBSE Class 9 Mathematics Circle Assignment Set C