A man wants to build a triangular lot. What would Angle A, B, and C? (Side lengths in description)

Question

P.s sorry can't draw the triangle it would have made it easier.

AB is 211.

BC is 142. 

AC is 185. 

Thanks :)

Answer 1

Use the Law of Cosines:

 

For ∠A:

142² = 211² + 185² - 2(211)(185) cos A