How to construct an angle of 221/2 degrees using a paur of compass? Please explain urgently

You cannot construct by compass. We can construct as-

Step 1- Draw a semi circular arc and using the same arc mark 60 and 120 degree.

Step 2- Bisect the angle between 60 degree and 120 degree in order to 90 degree arc.

Step3- Similarly bisect the 90 degree angle to get 45 degree

Step 4- Finally bisect 45 degree in order to get .

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