## RI Foresight

#### Curator of Classical4C

This page has been moved to Work Item 2001 – Concepts in the First 91 Pages.

1. Circle; that means, the same distance to a center. | Page 6
2. Line segment; that means, all points between two. | Page 6
3. Parallel; that means, two non-intersecting lines. | Page 12
• Parallel lines by drawing two perpendicular lines | Page 40
4. Perpendicular bisector; that means, a perpendicular line through the midpoint | Page 18
5. Conjecture; that means, a tentative basis without proof. | Page 18
6. Inscribed hexagon; that means, every vertex on the circle. | Page 24
7. Bisecting; that means, dividing into two parts.
8. Angle bisector; that means, an angle bisecting line. | Page 32
9. Congruent; that means, identical in form.
10. Congruent segments; that means, line segments of equal length. | Page 49
11. Square; that means, four congruent segments. | Page 49
12. Equilateral; that means, all sides congruent.
13. Equiangular; that means, all angles congruent.
14. Regular polygon; that means, equilateral and equiangular. | Page 49
15. Tessellation; that means, surface covering. | Page 65
16. Assertion
17. Rigid motions; that means, translations, rotations, and reflection. | Page 73
18. Rigid transformation; that means, no changes in measurements. | Page 73
19. Theorem | Page 73
20. Reflection across a line | Page 81
21. Translation; that means, sliding without rotating. | Page 90-91
22. Directed line segment | Page 90-91

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