Find the measure of given that
, , and .
Let represent the point where and intersect.
Step 1: Find .
The sum of a triangle's angle measures is , so we can find by subtracting the other 2 angles measures of from .
Step 2: Find .
and are vertically opposite angles of intersecting lines, so the measures of the angles are the same.
Step 3: Find .
The sum of a quadrilateral's angle measures is , so we can find by subtracting the other 3 angles measures of quadrilateral from .