After learning these five kinds, others are basically their "children and grandchildren".
(1) makes a line segment equal to a known line segment.
(2) Make an angle equal to the known angle.
(3) perpendicular bisector is a line segment.
(4) Make an angular bisector
(5) A vertical line passing through a known point.
PS:
1, remember to leave it as a trace when drawing with a ruler.
2. The auxiliary line is a dotted line.
Finally, remember to answer questions and remember to "answer".