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IM1.7.2 Slope Triangles 2: Parallel

Author:
Lind, Jon
Topic:
Triangles

Parallel Lines

Use your work on the last task to prove how the slopes of parallel lines are related using slope triangles. (Hint: What transformation will take slope triangles from one parallel line to another?)

Describe the reasoning shown in your construction above. How are the slopes of parallel lines related?