Could someone please help me with my trigonometry word problem ??

Question

Julia is building a triangular dog house for her chihuahua Jorge, with three boards of wood. Board a is 8 feet, board b is 12 feet, and board c is 6 feet long. What would the angles between the boards of wood be?

Answer 1

Use the law of cosines to find one angle, then use the law of sines to find a second angle.

Find the third angle by subtracting the other 2 from 180.