Answer: the measure of angle ACB is 72 degrees.
Step-by-step explanation:
The sum of the angles in a triangle is 180 degrees.
This means that
Angle CAB + angle ABC + angle ACB = 180 degrees. Therefore
70 + 38 + angle ACB = 180
108 + angle ACB = 180
angle ACB = 180 - 108 = 72 degrees
