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CHAPTER AT A GLANCE
Circles
•Unit: Geometry
•Board weightage: Geometry carries about 15 marks out of 80; this chapter usually gives one proof or numerical question of 3 marks or 4 marks and short questions on tangents (please check the latest sample paper)
•This textbook edition covers: tangent to a circle, Theorem 10.1 (tangent is perpendicular to the radius) and Theorem 10.2 (lengths of tangents from an external point are equal). Constructions of tangents are not in this edition.
•Most scoring part: numerical questions using the Pythagoras theorem with a tangent, and proofs using Theorem 10.1 and Theorem 10.2
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