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Virat
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Since AB and AC are congruent chords, they are equidistant from O. In triangles AOB and AOC, OA is common and OB = OC. Hence, the triangles are congruent, giving ∠BAO = ∠OAC. Therefore, AO bisects ∠BAC.

chords ab and ac are congruentcircle lies on the angle bisector of ∠baccircle with centre oclass 9 maths ganita manjari chapter 5 question answeri’m up and down and round and round: solutions class 9 (ganita manjari)ncert solutions – i’m up and down and round and round (new book 2026-27)
Piyush365
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Since OA and OB are radii, triangle AOB is isosceles. Given ∠AOB = 60°, the other two angles are also 60°. Thus, triangle AOB is equilateral, so AB = OA = 12 cm.

central angle aob is 60°circle with centre oclass 9 maths exercise 5.4 all solutions – i’m up and down and round and roundncert class 9 maths ganita manjari chapter 5 solutionsradius of the circle is 12 cm