Find `m angleC` in fig 3.33 if `AB||DC`

Explanation

To find the measure of angle C in the given figure where AB is parallel to DC, we can follow these steps:

### Step 1: Understand the properties of parallel lines
When two lines are parallel, the angles formed by a transversal line intersecting them have specific relationships. In this case, since AB is parallel to DC, we can use the properties of corresponding angles or alternate interior angles.

### Step 2: Identify the angles
From the problem, we know that angle C is one of the angles formed by the transversal intersecting the parallel lines AB and DC. We are also given that there is another angle, which we will assume is 120 degrees.

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