Why is angle 1 congruent with angle C in the diagram

A. They interior angles to the triangle
B. They are corresponding angles
C. They are exterior angels to the triangle
D. They are vertical angles

Please help me with this answer

Why is angle 1 congruent with angle C in the diagram A They interior angles to the triangle B They are corresponding angles C They are exterior angels to the tr class=

Respuesta :

Answer:

They are vertical angles

Step-by-step explanation:

They are opposite each other