1. Lesson 4-4 Example 3 4-4 Example 3 Sketch supplementary angles when one angle’s measure is 75°. 1.Use the center point on the protractor as the common vertex of the supplementary angles.

2. Lesson 4-4 Example 3 4-4 Example 3 Sketch supplementary angles when one angle’s measure is 75°. 2.Draw one side of the angle and place an arrow at the end of the ray.

3. Lesson 4-4 Example 3 4-4 Example 3 Sketch supplementary angles when one angle’s measure is 75°. 3.The sum of supplementary angles equals 180°. Find the angle on the protractor’s scale and make a dot. Use a straightedge to draw a second ray that connects at the vertex.

4. Lesson 4-4 Example 3 4-4 Example 3 Sketch supplementary angles when one angle’s measure is 75°. 4.Find the given angle, 75°, inside the 180° angle and make a dot. Use a straightedge to draw the ray that connects the vertex and the dot at 75° from either of the two existing rays.

5. Lesson 4-4 Example 3 4-4 Example 3 Sketch supplementary angles when one angle’s measure is 75°. 5.Find the missing angle by using the protractor’s scale. The supplementary angle is 105°.