Easiest is to use a protractor.
Alternative: Draw a 90 degree angle.
Bisect the external angle so that it is 45 degrees.
Trisect that angle so that the angle adjacent to the 90 degree angle is 15 deg
Then 90 + 15 degrees = 105 degrees.
Both, bisection and trisection require the use of a compass (and ruler).
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A 75 degree angle.
Yes
First draw a 90 degree angle .Than draw a 20 degree angle from that 90 degree angle . Than the rest of the angle will be 90-20=70 .Now bisect the 70 degree angle we will get 70/2=35. Now add the rest of the angle means 35+20 =55 GOT 55 DEGREE ANGLE
With the help of a protractor
Use a protractor.