Inverse SOHCAHTOA Way vs Interior Angle Sum
What is the degree measure of LNM?
Alternately, you could use the inverse of one of the SOHCAHTOA functions, in this case the inverse of sine (sin-1)! To find, an angle of a right triangle all that we need to know is the length of two sides! Then use the same SOHCAHTOA ratios -- just in a different fashion See the example below.