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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
The supplement of a 35 degree angle would be 145 degree angle.
The supplementary angle to a 145 degree angle will be a 35 degree angle because 145 + 35 = 180.
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