Question

PLEASE HELP THANK YOU

The steps below can be used to show that the angles in a triangle sum to 180°. Which angle facts should replace A, B and C to complete the steps? I have attached the picture of A,B and C.

These are the angle facts you need to choose from:
Corresponding angles are equal
Vertically opposite angles are equal
Alternate angles are equal
Angles around a point sum to 360°
Angles which make a straight line sum to 180°
Co-interior angles sum to 180°​

Answer 1

X. Alternate angles are equal.

Y. Alternate angles are equal

Z. Angles on a straight line add up to 180°

Answer 2

A=Alternate angles are equal

B=Alternate angles are equal

C=Angles which make a straight line sum to 180°

Explanation:

A and B: if two lines are parallel and are intersected by a line then the angles on the opposite sides are equal to each other

C: a flat line is equal to 180 degrees