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Question Which angle is greater: ∠XOY or ∠AOB? Give reasons.
Using a single letter name like ∠P is insufficient in case of two or more angles having the same vertex. Here, ∠P can be considered for any of the three angles ∠APB, ∠BPC or ∠APC. So, here it is necessary to use three letters in specifying an angle.
2.7 Making Rotating Arms 2.8 Special Types of Angles Figure it Out (Page No. 29-31)