Final answer:
Angle C is 70 degrees since angle ABC is congruent to angle XYZ, and angle Y, which is part of angle XYZ, measures 70 degrees.
Step-by-step explanation:
If angle ABC is congruent to angle XYZ, and it is given that angle Y equals 70 degrees,
we can determine that angle C must also be 70 degrees.
This is because congruent angles have the same measure.
Therefore, if angle Y is part of angle XYZ and it measures 70 degrees, and
angle XYZ is congruent to angle ABC, then angle C must also measure 70 degrees.