The interactive demonstration below illustrates the Law of cosines formula in action. Drag around the points in the triangle to observe who the formula works. Try clicking the "Right Triangle" checkbox to explore how this formula relates to the pythagorean theorem.
| a | b | c | |
|---|---|---|---|
| Length | 12.23 | 12.23 | 12.23 |
| Length2 | 12.23 | 12.23 | 12.23 |
Drag Points Of The Triangle To Start Demonstration
Further Reading:
- Law of Cosines challenge problems (more advanced problems and also word problems)
- Law of cosines worksheet
- Law of sines vs cosines
- Law of Sines
- Worksheet on law of sines and law of cosines (pdf)
