Two parallel lines are cut by a transversal. which statements are true for all such cases? select three that apply. a. each pair of vertical angles is congruent. b. each pair of corresponding angles is congruent. c. each pair of supplementary angles is congruent. d. each pair of alternate interior angles is congruent.

All except for c

For c, if the pair of angles are supplementary and congruent, they can only be 90° because they are congruent ( meaning they are the same measurements) however this is not the case all the time

Hope this helps

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.