This is how you bisect an angle.
1. First draw an angle.
2.Then draw an arc with a compass that cross in the middle of lines ab and bc.
3. Draw an arc from point 1 with the same distance of the compass before and draw another arc from point 2 with the same distance the the as before.
4. Then draw a straight line from point b through point x. The line bisects the angle abc.
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