Lesson 9-1 Angle Relationships Answers //free\\ [2024]

Use the diagram (not shown, but typical). If ∠1 and ∠2 are vertical, and m∠1 = (5x + 7)°, m∠2 = (8x – 14)°, find x and m∠1.

Some questions in Lesson 9-1 require you to combine relationships.

If you see a straight line with a ray coming from the midpoint, those two adjacent angles must add to 180°. Lesson 9-1 Angle Relationships Answers

Angles A and B are complementary. If m∠A = 27°, find m∠B.

4 x plus 20 equals 180 right arrow 4 x equals 160 right arrow bold x equals 40 3. Quick Reference Table Relationship Visual Clue The letter "X" shape Complementary 90 raised to the composed with power The letter "L" shape / Right angle Supplementary 180 raised to the composed with power Straight line 4. Pro Tips for Success Use the diagram (not shown, but typical)

Scenario B: Supplementary Angles

In the figure, ∠A and ∠B are complementary. ∠B and ∠C are supplementary. m∠A = 28°. Find m∠C. If you see a straight line with a

To master Lesson 9-1, you must first be able to identify the following types of angle pairs: