Work Item 2001 – Concepts in the First 91 Pages

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Section A | What to Do

1. Read everything under Section B below, from the top down.
2. Remember as many of the following thumbnail definitions as possible.
3. Use the provided page number to find the term in the print edition of the Geometry book.
4. Visit https://ri4c.com/geometry/ for the online edition of the book; you can now access a Geometry book from your phone or computer.
5. Take the following test:
   • Test 101 Accessing Online Resources for Geometry

Section B | Thumbnail Definitions for Geometry

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. Polygon; that means, a plane figure with at least three straight sides and angles.
13. Equilateral; that means, all sides congruent.
14. Equiangular; that means, all angles congruent.
15. Regular polygon; that means, equilateral and equiangular. | Page 49
16. Tessellation; that means, surface covering. | Page 65
17. Assertion
18. Rotation; that means, a center and a directed angle.
19. Perpendicular; that means, at an angle of 90 degrees.
20. Reflection; that means, the same perpendicular distance to a line.
21. Rigid motion; that means, translation, rotation, or reflection. | Page 73
22. Rigid transformation; that means, rigid motions without changes in measurements. | Page 73
23. Theorem | Page 73
24. Reflection across a line | Page 81
25. Translation; that means, sliding without rotating. | Page 90-91
26. Directed line segment | Page 90-91

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