to find the angles and sides of a right traingle
It is no more nor less important than any other theorem for congruence.
Theorems are important statements that are proved.
suck my balls
Because otherwise the fundamental theorem of arithmetic, the unique factorisation theorem, would fail.
to find the angles and sides of a right traingle
No, in fact it is the opposite. A corollary is normally a special case of a theorem and is usually sufficiently important for it to be proven separately from the theorem. This is so that it can then be used in the future. Corollaries follow a theorem and can usually be derived from it very easily.
It is very important in circuit analysis.
it helps to find the side measures of a right triangle
use to see what type of latter to use
Lagranges Theorem
The basic proportionality theorem is an important tool for proving similarity tests such as SAS. It is used in comparison of similar triangles and finding their measurements.
The central limit theorem is one of two fundamental theories of probability. It's very important because its the reason a great number of statistical procedures work. The theorem states the distribution of an average has the tendency to be normal, even when it turns out that the distribution from which the average is calculated is definitely non-normal.