Answer:
18) a. X
19) d. 69°
Step-by-step explanation:
18) A reflection is a transformation where an image is flipped over a line. So V will still be in the same place, it will just be flipped over line B. The only answer that makes sense in X.
19) All the angles in the picture are vertical angles. Vertical angles are angles that are across from each other when two lines cross and they are always equal.
The angle opposite the angle that is 78° is also 78°.
The angle opposite the angle that is 33° is also 33°.
The three angles form a straight line so:
78° + 33° + x = 180°
111° + x = 180°
x = 69°
Since the angle is a vertical angle and is opposite angle a, angle a will also be 69°.
Hope this helps. :)
