Geometry GName______________________________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., on7.Name the points on the interiorof FAB , , , 8.Name the points onFAB., , , 1MAXRICKMAX12S M A R T F B Y N
Name______________________________________________________________________ Date__________________ Hour_____________3.2 Notes – Angle MeasureGeometry GIn geometry, angles are measured in units called ____________________. The symbol is _______.There are 4 different types of angles:Name ofangleDefinitionExampleACUTEOBTUSERIGHTSTRAIGHTExample 1:Use a protractor to measure PRO. What kind of angle is it?4PRO
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) 25D 5
Example 4:The measure of B is 138. Solve for x.(5x – 7)BGeometry GName: ____________________________Protractor Practice Worksheet 1Date: ____________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 GName: ____________________________Protractor Practice Worksheet 2Date: ____________Measure each angle to the nearest whole degree. You may have to extend the sides of your angle to do the measurement.220.127.116.11.5.6.8
Draw each angle using a Protractor.7.35A8.100B9.150C10.50D11.90F12.180G9
Review 3.1 – 21]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:501259015810BAT2BRICKABCDEFG