CBSE Class 10 Maths – Circles

Circles is a deductive geometry chapter in CBSE Class 10 Mathematics carrying approximately 6 marks. It focuses specifically on the properties of tangents to a circle and the formal proofs of two key circle theorems.

The chapter covers tangents to a circle, proving that the tangent is perpendicular to the radius at the point of contact, proving that tangents from an external point are equal in length, and proving properties of circumscribed polygons.

Students should master the formal proof that tangents from an external point are equal, use Pythagoras' theorem with tangent-radius right triangles, and practise proving that circumscribed quadrilaterals have equal opposite side sums.

TutorVertex offers tailored question sets for Circles, covering standard chord/tangent lengths as well as complete board geometric theorem proofs.