2. What did the acorn say after it grew up? Gee, I’m a tree Geo : metry : Definition: A statement that explains the meaning of a word or phrase Format for notes: (Optional method)TermDefinitionExample EarthMeasure

3.  Point  Most basic building block of geometry  It has no size, only location  Notation: Capital Letter  Line  A straight, continuous arrangement of infinitely many points  Infinite length but no thickness  Extends forever in two directions  Notation: Naming any two points on line with line symbol above  Plane  Length and width but no thickness.  Like a flat surface that extends infinitely along its length and width.  Notation: Script Capital Letter P B A P

4.  Collinear  On the same line  Coplanar  On the same plane  Line Segment (segment)  Two points called endpoints of the segment and all the points between them that are collinear with the two points.  Notation:  Length: F D EP Q R A B Endpoints 5 cm

5.  Congruent Segments  Two segments with the same lengths  Symbol:  Notation:  Marking figures  Midpoint  A point that divides the segment into two congruent segments A B C D O N M Midpoint

6. Ray A part of a line that begins at a point and extends infinitely in one direction. Notation: D A Opposite Rays Two rays that share the same endpoint and form a line. Notation: B C A and

7. B D C A M L K N 4. Name a midpoint 5. Name congruent segments 1. Name a line 2. Name a line segment 3. Name a ray F

8. Postulate 1-1 Through any two points there is exactly one line. Line t passes through points A and B. Line t is the only line that passes through both points. B A t Postulate 1-2 If two distinct lines intersect, then they intersect in exactly one point. andintersect at point C. B ED A C p. 16: 9-49 odd, 53-59