A horizontal line has points D, B, C. A line extends vertically from point B to point A. Given that Ray B A bisects ∠DBC, which statement must be true?
a) m∠ABD = m∠ABC
b) AB ≅ BC
c) B is the midpoint of DC.
d) m∠DBC = 90°

  a) m∠ABD = m∠ABC

Step-by-step explanation:

The meaning of angle bisector is that each of the created angles is congruent to the other:

  m∠ABD = m∠ABC

1. minimum

2. 6400

3. eight

hope this !

since no one answered yet i will give it a shot, not completely sure tho.

i think it should be y=cos(x+2pi), (third answer, answer c)

good luck.