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