31. AB and CD are equal arcs of a circle with centre O. (i) If angle AOB = 130°, find angle ODC.
(ii) If angle OCD = 60°, find angle AOB.
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31. AB and CD are equal arcs of a circle with centre O. (i) If angle AOB = 130°, find angle ODC.
(ii) If angle OCD = 60°, find angle AOB.
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