1. Geometry 2.4
Adjacent Angles

2. 1. Next To 2. Nowhere Near 3. I Don’t Know 4. I Don’t Care
What does Adjacent mean?
1. Next To 2. Nowhere Near 3. I Don’t Know 4. I Don’t Care

3. 1. Next To 2. Nowhere Near 3. I Don’t Know 4. I Don’t Care
What does Adjacent mean?
1. Next To 2. Nowhere Near 3. I Don’t Know 4. I Don’t Care

4. Adjacent Angles Share a Vertex and a Common RayB

5. Name the 2 Adjacent Angles
ABC and
CBD A C B D

6. You can find the measure of a combined angle if you know the measures of the adjacent angles
ABC + CBD = ? A
ABD C B D

7. You can find the measure of a combined angle if you know the measures of the adjacent angles
ABD = ? A 40 C
= 70 30 B D

8. You can find the measure of an outside angle if you know the measures of the inside angles
ABD = ? A 20 C
= 50 30 B D

9. Now Apply What You Know

10. If the outside angle ABD = 100, and inside angle ABC = 60, what is the other inside angle CBD?
100 – 60 = 60 A C 40 ? B D

11. If the outside angle ABD = 25, and inside angle ABC = 15, what is the other inside angle CBD?= 15 C 10 ? B D

12. Acute, Right, Obtuse, or Straight?
Review!!
Acute, Right, Obtuse, or Straight?

13. Name that Angle:
Obtuse

14. Name that Angle:
Obtuse

15. Name that Angle:
Acute

16. Name that Angle:
Straight

17. Name that Angle:
Right

18. Ready 4 Some Problems?