1. Questions to Ponder 1-1 & 1-2
Geometry
Questions to Ponder
1-1 & 1-2

2. Who is the father (founder) of Geometry?
What is Geometry?
The study of points, shapes, sizes, and their properties.
Who is the father (founder) of Geometry?
Euclid

3. A two dimensional drawing that illustrates a three dimensional shape.
Net
A two dimensional drawing that illustrates a three dimensional shape.

5. Isometric Drawing
Shows a corner view of a three-dimensional figure along with a front, side, and top view.

6. Real World

7. Orthographic Drawing
Shows three separate views of a three dimensional drawing (top, front, and side).

8. You try
Page 7
6 - 8, ,

9. A Point Indicates a location. Cannot be measured
Named by a capital letter or its location A

10. Line Straight path that extends in both directions without an end.
Cannot be measured.
Has infinitely many points
Named…
Any two points on the line
A lower case letter A C B m

11. Line
Name the given line… A C B m

12. Segment
Part of a line that consists of two endpoints and all of the points between them.
Can be measured.
Named…
Any two points on the line A C B m

13. Segment
Name the segments that are part of the given line… A C B m

14. Segment
Why are these two segments considered to be the same? A C B m

15. Ray
Part of a line that consists of an endpoint and all the additional points on the line going away from it.
Cannot be measured.
Named…
By its endpoint and another point on the ray. A C B m

16. Ray
Name the rays that are part of the given line… A C B m

17. Ray
Why can this one ray be named two different ways? A C B m

18. Ray
Why are these two rays not the same? A C B m

19. Opposite Rays Two rays that share the same endpoint and form a line. CB m

20. Which are Opposite RaysB m

21. Plane Flat surface that extends without end and has no thickness A
Cannot be measured.
Has infinitely many lines
Named…
Any three points not on the same line
A capital letter A B C X

22. Constructed Definitions
If two workers that work together are considered to be coworkers, then…
Points that are on the same line are considered ____________.
Points and lines that are in the same plane are considered ___________.
collinear
coplanar

23. A ___________ or _________ is an accepted statement or fact.
postulate
axiom

24. Postulate 1-1 Through any two points, there is exactly one line. A B D

25. Postulate 1-1 Through any two points, there is exactly one line. A B D

26. Postulate 1-1 Through any two points, there is exactly one line. A B D

27. Postulate 1-1 Through any two points, there is exactly one line. A B D

28. Postulate 1-2
If two distinct (different) lines intersect, they cross at exactly one point. A B D C

29. Postulate 1-3
If two distinct (different) planes intersect, they cross at exactly one line.

30. Assignment
Worksheet