ASAP BRAINLIEST!! Which undefined terms are needed to define parallel lines?

Point, line
Line, plane
Coplanar, line
Point, coplanar

△cde maps to △stu with the transformations (x, y) arrowright (x − 2, y − 2) arrowright (3x, 3y) arrowright (x, −y). if cd = a + 1, de = 2a − 1, st = 2b + 3 and tu = b + 6, find the values of a and b. the value of a is and the value of b is .

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

I’m confused on how to work the pie charts