How to use the law of cosines to find out no triangles exist

The video tutorial covers constructing and labeling triangles, understanding triangle proportions, and selecting the appropriate cosine formula. It demonstrates applying the law of cosines to solve for unknowns in a triangle. The tutorial concludes with error checking, revealing that the given dimensions do not form a valid triangle.

What is the first important step when working with law signs and law triangles?

Why is it important to label all parts of the triangle?

What does the law of cosines help us determine in a triangle?

How do you identify the largest angle in a triangle based on side lengths?

What conclusion can be drawn if the calculated angle equals 180 degrees?