Angle M equals 27.5
Angle J equals 125. The two sides are congruent, and angles of triangles equal 180.
Since you know one angle, subtract that from 180.
You’re left with 55. Because the the sides are congruent, the angles are as well. They will be equal.
55 divided by 2 = 27.5
Angle M = 27.5
Angle K = 27.5
Angle J = 125
27.5+27.5+125=180
