A survey crew places a marker at point A. They then place a second marker (B), and the distance between A and B can be described by the vector components (1, 6). From point B they move to a third point, C, and the distance from point B to C can be described by the components (8.-3), which set of components below describes the vector components from point A to point C? A. (9, 3)
b. (15, 7)
c. (11, 12)
d. (17, 3)
e. None of these answers are correct.

the second option

step-by-step explanation:

statement #3: proof- ang is congruent to ang ecd : angles are congruent.  

step-by-step explanation:

1: the missing angles in statement #3  

a.) acb  

reason- the reason why the answer is acb is because angle ecd and angle acb are both the same size *that's what the word congruent means this is really simple.  

2: the missing word in reason #3  

c.) vertical  

reason- the reason why the answer is vertical is because the angles in that diagram on figure 2 is slanted, which is vertical, and the e and a both lay on vertical lines. along with the other's, but e and a are the 2 main points you want to focus on. and c is kind of like your starting point, because c is for both angles, not just one.  

i hope that was and understanding.