Mathematics
In the figure, O is the centre of the circle and AC = BC = 3.5 cm. ∠ACO will be :
60°
80°
90°
100°
Circles
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Answer
The line joining the centre of a circle to the midpoint of a chord is perpendicular to the chord.
Since,
AC = BC [C is the midpoint of AB]
O is the centre.
Thus, OC is perpendicular to AB.
∠ACO = 90°.
Hence, option 3 is the correct option.
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