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

Regular Polygons and Equivalent Triangles
bewijs stelling van Pythagoras
Parallelogram Anatomy
z`]]
רישום חופשי

Discover Resources

Circle Relationships
Pattern Block Symmetry
median_brodyroberts
การบวกลบจำนวนเต็ม
MaxModCos

Discover Topics

Sine
Algebra
Hyperbola
Percentages
Unit Circle