1. Geometry Notes
Section 1-1

2. What you’ll learn How to identify and model points, lines, and planes
How to identify collinear and coplanar points and intersecting lines and planes in space.

3. Point-- A point is simply a location
Draw it with a dot
Name it with a CAPITAL printed letter– you only have 26 choices P
Fact: It has no shape—no thickness, width, or length—therefore it has no dimension
Words/Symbols: point P

4. Collinear points are points that lie on the same line
Line– made up of points
Draw it with arrows
Name it with
With 2 points on the line
a lowercase cursive letter– again 26 choices n A
Fact: There is exactly one line through any two points
Words/Symbols:
Line AB, line BA n
AB or BA B
Collinear points are points that lie on the same line ↔ ↔

5. Plane—flat surface made up of points
Draw it with a shaded, slanted, 4-sided figure
Name it with
With 3 noncollinear points
a CAPITOL CURSIVE letter– again 26 choices B A C
Fact: There is exactly one plane through 3 noncollinear points
Words/Symbols:
CAT B T
Coplanar points are points that lie on the same plane

6. Examples

7. Have you learned? How to identify and model points, lines, and planes
How to identify collinear and coplanar points and intersecting lines and planes in space.
Your assignment is Worksheet 1.1