Back to Parallel lines are taken to parallel lines — Problem 1 · Task Set 21

Exercises: Rigid Motions Preserve Parallelism

Work through each section in order. Two lines are parallel when they have the same slope (or are both vertical). For each transformation, find the slopes of the image lines and check whether they stay equal.

Grade 8·20 problems·~30 min·Common Core Math - Grade 8·standard·8-g-a-1c

Work through problems with immediate feedback

Recall / Warm-Up

Two lines are parallel. Which statement about their slopes must be true?

Their slopes are equal (or both lines are vertical)

Their slopes are opposite in sign

Their slopes multiply to give -1

One slope is always 0