1. Points - Lines - Planes - Geometry and Measurement

2. Point - A location on a line, plane or space. You name a point with a capital letter A B C Lines, Line Segments and Rays

3. A B A line- is a straight path that has no beginning and continues without end in both directions. We say line AB or line BA Lines, Line Segments and Rays

4. A line segment is part of a line. It has two end points. We say line segment CD or line segment DC C D

5. A light beam is a ray. A ray is a part of a line. It has one end point and continues without end in one direction. We say ray EF. E F

6. Two lines on the same plane that never meet are parallel lines. A B C D These symbols tell us that the lines are parallel. AB DC Symbol:

7. Two lines that meet and make a square corner or 90 degree angle are perpendicular lines. Means perpendicular A B C Symbol AB BC

8. Skew lines - are lines not in the same plane that never intersect

9. 1.) Name all segments that intersect DE 2.) Name all segments that are parallel to DE 3.) Name all segments that are skew to DE

10. Plane- A flat surface that extends endlessly in all directions Plane ABC A C B