Lesson 86. Properties of Parallel Lines

T6-criterion for parallel lines

[bgcolor=orange] If two lines are intersected by a third line, and alternate interior (or exterior) angles are equal, then the original two lines are parallel. [/bgcolor]

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Building Trapezoids with Set Areas
Rolling Circles and Polygons
Slope Between 2 Points (Phase 2)
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UCSS Secondary Math I Unit 5 Lesson 2
Long Division of Cubic Functions
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Square Pyramid with Holes (AR Modeling Challenge)

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