1.4: Measure and Classify 1.4: Measure and Classify Angles Angles Objectives: 1. To define, classify, draw, name, and measure various angles 2. To use the Protractor and Angle Addition Postulates 3. To construct congruent angles and angle bisectors with compass and straightedge 4. To convert angle measurement between degrees and radians
36
Embed
1.4: Measure and Classify Angles Objectives: 1.To define, classify, draw, name, and measure various angles 2.To use the Protractor and Angle Addition.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
1.4: Measure and Classify 1.4: Measure and Classify AnglesAngles
Objectives:1.To define, classify, draw, name, and
measure various angles2.To use the Protractor and Angle Addition
Postulates3.To construct congruent angles and angle
bisectors with compass and straightedge4.To convert angle measurement between
degrees and radians
VocabularyVocabulary
Angle Obtuse Vertex Right Sides Straight Acute Congruent ’s
In your notes, define each of these without your book. Draw a picture for each word and leave a bit of space for additions and revisions.
AngleAngle
• An angleangle consists of two different rays (sidessides) that share a common endpoint (vertexvertex).
• Angle ABC, ABC, CBA or B
• The vertex is the key
B
A
C
Sides
Vertex
A “Rabbit Ear” antenna is a physical model of an angle
AngleAngle
• Each angles creates 2 regions: INTERIOR INTERIOR and EXTERIOR. EXTERIOR.
Example 1Example 1
How many angles can be seen in the diagram?
Name all the angles.
XY
W
Z
3
< WXY, < YXZ, <WXZ
How Big is an Angle?How Big is an Angle?
Is the angle between the two hands of the wristwatch smaller than the angle between the hands of the large clock?– Both clocks read 9:36