Search IntMath
Close

450+ Math Lessons written by Math Professors and Teachers

5 Million+ Students Helped Each Year

1200+ Articles Written by Math Educators and Enthusiasts

Simplifying and Teaching Math for Over 23 Years

# What is Triangle Calc C in Geometry?

If you’re a student of geometry, then you’ve probably come across triangle calc c—or more precisely, the Law of Cosines. This law states that the square of a triangle’s longest side (c) can be calculated by taking the sum of the squares of the other two sides and subtracting twice the product of those two sides multiplied by the cosine of their included angle (C). In layman’s terms, this means that if you know two sides and their included angle, you can calculate the third side. Let's break it down further.

## Triangle Calc C Explained

The Law of Cosines was first discovered by Girard Desargues in 1643. It is one of three equations used to calculate a triangle's sides and angles. The other two are the Pythagorean theorem and the Law of Sines. All three formulas are based on trigonometry; they involve multiplying or dividing angles and/or lengths to calculate different parts of a triangle.

The Law of Cosines formula is c2 = a2 + b2 – 2ab × cos C. In this formula, “a” and “b” represent the lengths of two sides in a triangle, while “C” stands for their included angle (in other words, an angle formed between those two sides). To solve for c—the length of the third side—you must plug in all three variables into an equation solver or use an online calculator to get your answer.

The Law of Cosines can also be used to solve for an angle when two side lengths are known but not their included angle; just rearrange the formula to solve for “C” instead! This process will require some basic algebra skills and knowledge about trigonometry concepts such as sine, cosine, tangent, etc., so make sure you brush up on these topics before attempting to solve any equations yourself!

## Conclusion:

In conclusion, Triangle Calc C—also known as The Law Of Cosines—is a powerful tool that helps students understand how triangles work by allowing them to calculate various parts with minimal effort. By understanding this equation better, students may find themselves better equipped to tackle other math problems involving triangles and trigonometry concepts such as sine, cosine, tangent etc., in future classes. Overall, Triangle Calc C is definitely worth looking into if you want to become more familiar with geometry!

## FAQ

### What is C in a triangle?

C stands for the included angle between two sides of a triangle. It is used to calculate the length of the third side using the Law of Cosines equation.

### How do you find C in a triangle?

You can find C by rearranging the Law of Cosines equation to solve for C instead of c (the length of the third side). This process will require basic algebra skills and knowledge about trigonometry concepts such as sine, cosine, tangent, etc. You can also use an online calculator or equation solver to get your answer.

### How do you find C and B of a triangle?

You can use the Law of Cosines equation to calculate C and B given two side lengths. First, rearrange the equation to solve for C (the included angle) instead of c. Then, plug in your known side lengths into the equation solver or calculator and you will be able to find both C and B!

### What is C in hypotenuse?

C stands for the included angle between two sides of a triangle, one of which is the hypotenuse. This angle can be used to calculate the length of the third side using the Law of Cosines equation.