A triangle has sides A, B, and C. Sides A and B are of lengths #4# and #7#, respectively, and the angle between A and B is #(3pi)/4 #. What is the length of side C?
Side C=10.1 units
This question can be used using the law of cosines, and equation used to figure out information regarding either side length or angle of a non right triangle. The formula is
P.S. I assumed that the angle was in radians.