1.3 KiB
1.3 KiB
| title |
|---|
| Law of Cosines |
Law of Cosines
The Law of Cosines can be used to find the ramaining sides or angles of a non-right triangle when given either the length of two sides and its included angle (SAS) or the lengths of the three sides (SSS).
The Law of Cosines states:
This looks very similar to the Pythagorean Theorem, and if C was 90 degrees (a right triange), the expression acctually simplifies to the Pythagorean Thoerem. So, the Pythagorean Theorem is a special case of the Law of Cosines.
You can also switch the angle C with either A or B, but make sure to change the respective side (c) to a or b.
Ex:
More Information:
https://www.varsitytutors.com/hotmath/hotmath_help/topics/law-of-cosines http://mathworld.wolfram.com/LawofCosines.html