Question

AB and BC are tangents of the circle with the center at D. The measure of ACD = 25o. Which is the measure of ABC?

Answer 1

first step is " what is angle aDc ?"

notice triangle aDc is isosceles

Answer 2

once you find angle aDc, you know the angle of the arc ac the short way
and the angle of the arc ac the long way

angle B will be 1/2 the difference of the big arc ac minus the short arc ac

Answer 3

Is it 50?