✔️ <1 and <3 are opposite angles formed when two straight lines intersect. They both share the same vertex. Thus, they are vertical angles, which are congruent to each other.
<1 and <3 are vertical angles.
✔️<2 and <6 are alternate exterior angles.
<2 and <6 both lie outside the straight lines cut across by the transversal, and they also lie in the side of the transversal alternating each other
✔️<2 and <4 are corresponding angles.
They both take the same position on the same side of the transversal.
✔️<3 and <7 are alternate interior angles.
They are alternating angles along the transversal that are located just within the two lines intersected by the transversal.
✔️<4 and <3 are consecutive interior angles.
They are angles on the same side of the transversal but lie within the two straight lines intercepted by the transversal.
✔️<7 and <6 are linear pair angles.
They are angles on a straight line, and sum up to 180°.
