Illustration showing that the perpendicular bisector of a given line is the locus of points equidistant…

An illustration showing the construction used to divide a line AB into two equal parts; and to erect…

Illustration of the construction used to make a perpendicular bisector of a straight line.

An illustration showing the construction used to erect a perpendicular. "With C as a center, draw the…

Illustration showing a perpendicular bisector of a triangle extended outside of the triangle.