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प्रश्न
The figure given below, shows a Circle with centre O.
Given: ∠AOC = a and ∠ABC = b.
Find the relationship between a and b
बेरीज
उत्तर
∠ ABC = `1/2` Reflex (COA)
(Angle at the centre is double the angle at the circumference subtended by the same chord)
⇒ b = `1/2 (360 - "a")`
⇒ a + 2b = 360°
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