1. C HAPTER 1-1 (I DENTIFYING P OINTS, L INES, & P LANES ) What is the difference between a point, a line, and a plane? Think of a football field. The players are the points, yard lines, and the field is the plane.

2. C HAPTER 1-1 (I DENTIFYING P OINTS, L INES, & P LANES ) Point: No dimension. Represented by a dot. Line: One dimension. Never ends, keeps going in both directions. ( ) Use 2 points to name a line. Plane: 2 dimensions. Represented by a parallelogram, but does not end. Named by 3 points.

3. C HAPTER 1-1 (I DENTIFYING P OINTS, L INES, & P LANES ) Example: Collinear Points Coplanar Points Identify the lines, points, and plane in the figure given. V T S Q R n m P

4. C HAPTER 1-1 (I DENTIFYING P OINTS, L INES, & P LANES ) Segments & RaysLine Segment: Has 2 endpoints. Written as AB Ray: Has one endpoint, then continues to go the other direction. Written CD A B C D

5. C HAPTER 1-1 (I DENTIFYING P OINTS, L INES, & P LANES ) ExamplesGive another name for GH Name all rays with endpoint J Are HJ and JH the same ray? HJ and HG? E G F H J

6. C HAPTER 1-1 (I DENTIFYING P OINTS, L INES, & P LANES ) Intersection Where geometric figures have one or more points in common.

7. C HAPTER 1-1 (I DENTIFYING P OINTS, L INES, & P LANES ) Examples Name the intersection of MX and line a Name the intersection of plane C and plane D