Question

Decide if the sides form a triangle. If they do, decide which type of triangle.
A) 55* , equilateral
B) 65* , acute
C) 60* , obtuse
D) 95* , right

Answer 1

Rule: All 3 angles of any triangle always add to 180 degrees

Answer 2

Using that rule, we know,

60+11x+13x = 180

solve for x. Once you figure out what number x is, you can compute 11x and 13x.