Given triangle with angles , , and , and corresponding opposite sides , , and , which of the following sets of side lengths could represent a triangle according to the Law of Sines?
Table of contents
- 0. Review of College Algebra4h 43m
- 1. Measuring Angles40m
- 2. Trigonometric Functions on Right Triangles2h 5m
- 3. Unit Circle1h 19m
- 4. Graphing Trigonometric Functions1h 19m
- 5. Inverse Trigonometric Functions and Basic Trigonometric Equations1h 41m
- 6. Trigonometric Identities and More Equations2h 34m
- 7. Non-Right Triangles1h 38m
- 8. Vectors2h 25m
- 9. Polar Equations2h 5m
- 10. Parametric Equations1h 6m
- 11. Graphing Complex Numbers1h 7m
- OLD 1. Angles and the Trigonometric Functions Coming soon
- OLD 2. Trigonometric Functions graphs, Inverse Trigonometric Functions Coming soon
- OLD 3. Trigonometric Identities and Equations Coming soon
- OLD 4. Laws of Sines, Cosines and Vectors Coming soon
- OLD 5. Complex Numbers, Polar Coordinates and Parametric Equations Coming soon
- NEW (not used) 7. Laws of Sines, Cosines and Vectors Coming soon
- NEW (not used) 8. Vectors Coming soon
- NEW(not used) 9. Polar equations Coming soon
- NEW (not used) 11. Graphing Complex Numbers Coming soon
7. Non-Right Triangles
Law of Sines
Multiple Choice
Given triangle ABC with angles , , and , and corresponding opposite sides , , and , which of the following sets of side lengths could represent a possible triangle according to the Law of Sines?
A
, ,
B
, ,
C
, ,
D
, ,
0 Comments
Verified step by step guidance1
Recall the Law of Sines, which states that for a triangle with sides \(a\), \(b\), and \(c\) opposite angles \(A\), \(B\), and \(C\) respectively, the following ratio holds:
\[\frac{a}{\sin A} = \frac{b}{\sin B} = \frac{c}{\sin C}\]
Understand that for any set of side lengths to form a valid triangle, they must satisfy the triangle inequality: the sum of any two sides must be greater than the third side. Check this first for each set of given side lengths.
For each set of side lengths, verify if the triangle inequality holds:
- Check if \(a + b > c\)
- Check if \(a + c > b\)
- Check if \(b + c > a\)
If the triangle inequality is satisfied, use the Law of Sines to check if the ratios of sides to the sines of their opposite angles can be consistent. Since angles are unknown, consider if the side lengths could correspond to angles between 0° and 180° (excluding 0° and 180°).
Conclude that the set of side lengths that satisfy the triangle inequality and can correspond to valid angles (i.e., the Law of Sines ratios can be maintained with angles between 0° and 180°) represents a possible triangle.
Related Videos
Related Practice
Multiple Choice

