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]

New Resources

Building Trapezoids with Set Areas
Building Parallelograms with Set Areas
Slope Between 2 Points (Phase 2)
Conway Circle Theorem
רישום חופשי

Discover Resources

stirling engine
Circle Segment 1
Tre kugler
เกมส์คณิตคิดเร็ว
Transformations

Discover Topics

Intersection
Vectors
Cosine
Similar Triangles
Real Numbers