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10.1 Angles10.3 Angle Relationships
1—Measure angles
2—Identify and apply angle relationships
Sort
• Sort the pictures into 4 categories and name each type of angle.
Angles
Concept Map
• Pick one type of angle and complete a concept map for it.
• Give the definition, draw a picture, and tell where you would find it in the real world.
Measuring and constructing angles
• What do you use to measure a line?
• What do you use to measure an angle?
Video
• Measuring acute angles video (time 1:10)
• Measure the 4 angles on your paper.
Drawing angles---Draw .
• Draw a ray with a measure of 75°.
• Place the center point of a protractor on A. Align the ray with 0°.
• Use the scale that begins with 0°. Locate the mark labeled 75. Then draw the other side of the angle.
A
10-3 Angle Relationships
• Video
• Handout page 8
• Write a definition for adjacent and vertical angles. Then draw a picture of both.
Complementary Angles
Supplementary Angles
Classify as complementary or supplementary
• http://www.321know.com/geo-comp-or-sup.htm
Page 423
• Example 3
• Your turn a, b
• Example 4
• Handout page 10
Quadrant Card
Definition and picture of Complementary angles
Definition and picture of Supplementary angles
Definition and picture of Vertical angles
List 4 types of angles with picture (from beginning of lesson)
Homework
• page 414: 8-17 (don’t draw, just classify)
• and page 424: 1-22
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