3) Given angle is 70 degrees. Find angle ABC.

The diagram shows an inscribed angle $$\angle ABC$$ and the arc AC. The measure of the arc AC is given as 70 degrees.

The relationship between an inscribed angle and its intercepted arc is that the inscribed angle is half the measure of the intercepted arc.

So, $$\angle ABC = \frac{1}{2} \times \text{measure of arc } AC$$.

Given that the measure of arc AC is 70 degrees:

$$\angle ABC = \frac{1}{2} \times 70^\circ = 35^\circ$$.

The text below the diagram confirms that $$\angle ABC$$ is an inscribed angle.

Ответ: 35°