The sides of a triangle are m, n and \(\rm \sqrt{m^2+n^2+mn}\). What is the sum of the acute angles of the triangle?

The sides of a triangle are m, n and \(\rm \sqrt{m^2+n^2+mn}\). What i

1.	The sides of a triangle are m, n and \(\rm \sqrt{m^2+n^2+mn}\). What is the sum of the acute angles of the triangle?
A.	45°
B.	60°
C.	75°
D.	90°
Answer» C. 75°