Which of the examples match postulate 12.2

Through any three noncollinear points, there is exactly one plane

Find the value of x in the vertical angles theorem

If two angles form a linear pair of 180 degrees. What angle do they form

Angle 3 and Angle 6 are examples of which type of angle pair?

If the  $m\angle7\ =\ 115\degree,$  find the measure of  $\angle2.$  

The following represents slopes of two lines. Which answer choice describes the two lines?

m = 5 and m = -1/5

Find the slope of the line that passes through the points (2, 4) and (6, 12)