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]

Nuevos recursos

繪畫垂直線
Perpendicular Lines: Quick Exploration
Squares Question
Right Triangle Inscribed in a Semicircle
Pythagorean Theorem: Extension Exercises

Descubrir recursos

Adding and subtracting integers
Unit Fives geogebra sketch
Distance #1
Concave and Convex Lenses
Area of Triangle

Descubre temas

Cuadriláteros en general
Vectores 2D (dos dimensiones)
Circunferencia inscrita
Funciones Trigonométricas
Semejanza