2. 1.1 Vocabulary A segment is a part of a line that begins at one point and ends at another. A ray is a part of a line that starts at a point and extends infinitely in one direction. Example:

3. Plane Vocabulary Things you should know: –P–Points on a plane are said to be collinear if a single line can contain them all. –P–Points on a plane are said to be coplanar if a single plane can contain them all Plane EGF: Points E, K, and F are CollinearAll points are coplanar

4. Angletastic Angles: –Formed by two rays with a common endpoint “vertex of the angle” Rays are the “sides of the angle” –Divides the plane into two regions: INTERIOR EXTERIOR

5. 1.1 the Building Blocks of Geometry 1.1 describes the basic geometric figures These include points, lines, and planes. A point is an undefined term in geometry; a point can be thought of as a dot that represents a location on a plane or in a space. Here is an example of a point:

6. 1.1 the Building Blocks of Geometry A line is perfectly straight, contains an infinite number of points, extend infinitely in two directions, and have no thickness. A plane is a flat surface that extends infinitely in all directions. Example of line: Example of Plane:

7. 1.2 Measuring Lengths A number line is a line that has been set up to correspond with real numbers. –Whats the distance between the red bunny and the blue bunny?

8. CONTINUED Are you having trouble? To figure out this puzzling question that may possibly be on your final… Subtract the red bunny from the blue bunny HINT: (Absolute value of -13 – 3) thus equating the distance which is… 10!!!

9. 1.2 POSTULATES Segment Congruence Postulate: If two segments have the same length as measured by a fair ruler, then the segments are congruent Are these segments equal?

10. 1.2 POSTULATES Segment addition postulate: If point R is between points P and Q on a line, then PR+RQ=PQ PRQ

11. 1.2 Measuring Angles To measure an angle: –P–Put the center of the protractor at the vertex –A–Align the protractor so one ray is on the line 0 –R–Read the measure of the other ray.

12. 1.3 POSTULATES Angle Congruence Postulate: –If two angles have the same measure, then they are congruent Angle Addition Postulate –If point B is the interior of ACE. Then ACB+BCE= ACE

13. 1.3 Special Pairs Complementary pairs: –Two angles who measures have a sum of 90. Supplementary pairs: –Two angles whose measures have a sum of 180.

14. ANGLES Three types of angles: –Right angle- angle whose measure is 90. –Acute angle- angle whose measure is less than 90. –Obtuse angle- angle whose measure is more than 90.

15. Extra stufffff. http://www.tutorvista.com/search/angles-with- three-different-angles-are-calledtrianglehttp://www.tutorvista.com/search/angles-with- three-different-angles-are-calledtriangle http://www.kwiznet.com/p/takeQuiz.php?Chapter ID=2553&CurriculumID=37&Num=4.4http://www.kwiznet.com/p/takeQuiz.php?Chapter ID=2553&CurriculumID=37&Num=4.4