# 1_4_ANGLES _1_ (2).doc - Geometry G Notes Angle Notation...

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Geometry G Name______________________________ Notes: Angle Notation. Definition: An angle is formed by two rays that share a common endpoint. 1.The point that the two rays intersect is called the ________________________.2.The two rays are called the ______________ of the angle.3.When naming angles, it is typical to use one or three letters. Sometimes one cannot use one letter. When using three letters, the _________________ must be the letter in the middle. Other times one uses numbers to name the angles as below.4.Name an angle using one letter. _________5. 6. IRC can also be named in what two other ways? An angle breaks up a plane into three regions: the exteriorof the anglethe interiorof the anglepoints the angle. , on 7. Name the points on the interior of FAB , , , 8. Name the points on FAB. , , , 1 M A X RICKMAX12 S M A R T F B Y N
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Name______________________________________________________________________ Date__________________ Hour_____________ 3.2 Notes – Angle Measure Geometry G In geometry, angles are measured in units called ____________________. The symbol is _______. There are 4 different types of angles: Name of angle Definition Example ACUTE OBTUSE RIGHT STRAIGHT Example 1: Use a protractor to measure PRO . What kind of angle is it? 4 P R O
Example 2: Find the measure of each angle and classify it.a) VDSb) SDLc) IDSd) SDEIVLE SExample 3:Use a protractor to draw an angle having each measurement. Thenclassify each angle.a) 115b) 25 D 5
Example 4: The measure of B is 138. Solve for x. (5x – 7) B Geometry G Name: ____________________________ Protractor Practice Worksheet 1 Date: ____________ Goal: To measure angles using a protractor. 6
When using a protractor, you must use it correctly. What are the two things you need to do when using a protractor? 1. _______________________________________________________________________________ 2. _______________________________________________________________________________ 7
Geometry G Name: ____________________________ Protractor Practice Worksheet 2 Date: ____________ Measure each angle to the nearest whole degree. You may have to extend the sides of your angle to do the measurement. 1. 2. 3. 4. 5. 6. 8
Draw each angle using a Protractor. 7. 35 A 8. 100 B 9. 150 C 10. 50 D 11. 90 F 12. 180 G 9
Review 3.1 – 2 1] Name the angle in 4 ways: 2] What points are in the interior, exterior or on the angle? Interior: Exterior: On: 3] Use a protractor to measure each angle. ABG = EBC = ABF = FBC = ABD = FBD = 4] Us a protractor to draw an angle having each of the following measurements: 50 125 90 158 10 B A T 2 B R I C K A B C D E F G
Name_____________________________________________________ Date________________ Hour_______