75 degrees,
All triangles have a sum 180on the interior angles.
We know 90 and 30,
90+30=120,
180-120= 60.
60 is the measure of angle A.
Angle bisectors “cut an angle in half” per se, so 90/2=45.
45 is the measure of angle ACM
So, 60+45= 105,
180-105=75,
So the measure of the angle in question is 75.
