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

Area of a Trapezoid
Focus and Directrix
Regular Polygons and Equivalent Triangles
Slope Between 2 Points (Phase 2)
Area of a Circle Illustrated

Découvrir des ressources

Constructing a 60 degree line
Rectángulo-Caracol-Móvil
Derivative of |x|
cetacean or fish کپی از
Make sectors

Découvrir des Thèmes

Fonctions Logarithmiques
Quadrilatères
Pavé Droit
Figures Planes
Cosinus