What are the undefined notions?

Option #1: point, line, distance along a line, and distance around a circular arc

Option #2: arc, parallel lines, perpendicular lines, and angle

Option #3: distance along a line, distance around a circular arc, angle, and arc

Option #4: line segment, angle, point, and arc

1 answer

The undefined notions are:

Option #1: point, line, distance along a line, and distance around a circular arc
Option #2: arc, parallel lines, perpendicular lines, and angle
Option #3: distance along a line, distance around a circular arc, angle, and arc
Option #4: line segment, angle, point, and arc