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Aim: How do we name the angles formed by parallel lines and transversal?

Given: Two lines are parallel if and only if the two lines never intersect.

  • Draw a diagram illustrating the biconditional when both simples statements are true.

  • Draw a diagram illustrating the biconditional when both simples statements are false.

Summary

Based on our definition, is line t a transversal?

Definition

A transversal is a line that intersects two or more lines at different points.

HW #9- page 142 #1-3

Eight angles are formed by the intersection of a transversal t and two lines, l and m.

Warm-up:

Which of the following angles below will be the same measure? Why?

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