Chapter 10, Circles CBSE Class IX Mathematics NCERT Solutions of Math Textbook Exercise 10.2(page 173)Q 1: Recall that two circles are congruent if they have the same radii. Prove that equal chords of congruent circles subtend equal angles at their centers.Ans 1:A 'Circle' is an array of points which are equidistant from a fixed point. This fixed point is called as the 'Centre' of the circle
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