1. Oblique Triangles

2. Oblique Triangle – a non-right triangle.
It may be acute.
It may be obtuse.

3. We will label all our triangles the same way.
All triangles have six parts…three sides and three angles.
We will label all our triangles the same way.

4. A c b B a C

5. How you solve the oblique triangle depends on what you are given.
AAS
ASA
SSA
SSS
SAS

6. Decide whether the following are ASA, AAS, SSA, SSS, or SAS.
82
42 cm
65 cm
SAS

7. Decide whether the following are ASA, AAS, SSA, SSS, or SAS.
54
32 mm
ASA
37

8. Decide whether the following are ASA, AAS, SSA, SSS, or SAS.
14
AAS
22
19 miles

9. Decide whether the following are ASA, AAS, SSA, SSS, or SAS.
65
53 yd
SSA
87 yd

10. Law of Sines

11. Law of Sines a
sin A = b
sin B c
sin C a c b A B C

12. Law of Sines
AAS
ASA
SSA

13. Law of Cosines a2=b2+c2-2bc cosA b2=a2+c2-2ac cosB c2=a2+b2-2ab cosC a

14. Law of Cosines
SSS
SAS