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
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
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