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In the figure, in a circle with centre O...

In the figure, in a circle with centre O, length of chord AB is equal to the radius of the circle. Find measure of each of the following.
`/_AOB`

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Seg OA `cong` seg OB`" ""………"(" Radii of the same circle ")`
chord AB is equal to radius`" " "…….."(" Given ")`
`:. Seg AB cong seg OA cong seg OB`
`:. triangle AOB` is equoilateral
`:. /_AOB=60^(@)" " "…….."(" Angle of an equilateral triangle ")`
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