1. 4/20/2017
Chapter 1.1

2. Vocabulary point • line • coplanar lines • collinear points
• plane
• compass
• straightedge
• sketch
• draw
• construct
• coplanar lines
• skew lines
• ray
• endpoint of a ray
• line segment
• endpoints of a line segment
• congruent line segments

3. Basic Geometric Figures
Undefined terms:
Point
Line
Plane

4. Point Location shown by dots, can be endpoints or cornersX B y M
Point
Location shown by dots, can be endpoints or corners
HOW TO WRITE:
ONE Capital Printed letter such as A or X W X Z Y

5. Examples of Points

6. X
Is B on MY? B
Lines M y A
All points arranged perfectly straight with no thickness, and has infinite length.
HOW TO WRITE:
two points on the line, with a double-headed arrow over the two letters.
a single Lowercase Cursive letter.
AM MX XA y t

7. Examples of Lines

8. Intersection U
Symbol example: AB CD = X U D A X C B

9. Book P.4-5

10. Plane
A plane is a flat surface that extends infinitely in all directions.
HOW TO WRITE:
♥ named by three non-collinear points that lie on the plane Or
♥ It can be named by one Cursive Capital letter such as D.
ABC S R B A D C

11. Examples of Planes

12. Book p 7

13. Collinear Coplanar Points on the same line Points on the same plane
A B C D
Points on the same line B A
Coplanar C
Points on the same plane

15. Ray
part of a line that starts at a point and goes forever in one direction.
HOW TO WRITE: Letter under endpoint must be the start of the ray. B BA A

16. Segment
a part of a line that begins at one point and ends at another (the endpoints)
HOW TO WRITE:
The endpoints have a bar over them. C CD D A BA B

17. Book p.11-15 A B

19. Hatch Marks – short slash markings that show two or more segments are equal in length
W X Y Z
WX = YZ
Congruent - segments that have the same measure (like equal)
Urkle Stephon ~
Zack Cody

22. Show what you know!