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]

Nouvelles ressources

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Pathway to Proof: Triangle Angles
Rolling an Equilateral Triangle
Parallelogram Anatomy
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Découvrir des ressources

Special Right Triangle (II)
Ângulos correspondentes
Face Creation Through Reflection Chris Manzo P.1
diagram #4
Αντιγραφή του Completing the Square Visualisation

Découvrir des Thèmes

Ellipse
Nombres Complexes
Geometrie Fractale
Cercle Unité
Histogramme