|Question 10Math

Source Texts

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Clockwise from top left, the lines are labeled , , and .
Line
intersects both line and line .
At the intersection of line
and line , angle is labeled clockwise from top left as follows:
Top right:

At the intersection of line
and line , angle is labeled clockwise from top left as follows:
Top left:

A note indicates the figure is not drawn to scale.
In the figure, line is parallel to line , and both lines are intersected by line . If , what is the value of ?
A
B
C
D