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

Random Polar Curve (3)
Model sferyczny - dwunastościan-dwudziestościan
Cartesian vs Polar
Damped Trochoidal Curve
အခြေခံ data အခေါ်အဝေါ်များ

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Fraction Addition 2
Figure for Euclid XIII.3
EXAM Normal
BPW Inv. 2.2A - Congruent Triangles

Discover Topics

Rectangle
Curve Sketching
Secant Line or Secant
Subtraction
Constructions