2. ► A point is the place where two lines intersect. ► We identify this point with a number or a CAPITAL letter. ► A point has no length or width, it just specifies an exact location.

3. ► The term intersect is used when lines, rays, line segments or figures meet, that is, they share a common point. IN THIS CASE THE POINT OF INTERSECTION IS D

4. ► A line is made up of infinite points. It has not endpoints and continues endlessly on a plane. ► Usually these lines are named with lower cased letters such r,s,t… r

5. ► We may think of a ray as a straight line that begins at a certain point and extends forever in one direction. B

6. ► It has a beginning point and an endpoint A B

7. ► CURVED LINES

9. r r1

12. PLANES - A plane is a two- dimensional surface. - A plane can be defined by two parallel lines, two lines that cross one another or one point out of a straight line. F G A r s r s r

13. - A plane has legnth and width but no thickness. -It is like a flat surface that extends endlessly along its length and width. - it is represented by a four- sided figure drawn in perspective.

14. E F G F G Q - A plane is named with a script capital letter “ Q ”. - It may also be named using three points ( not on the same line) that lie on the plane, such G, F and E