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

רישום חופשי
Classifying Triangles
Sum of Squares: Proof without Words
Slope Between 2 Points (Phase 2)
Trammel of Archimedes Art

Descubrir recursos

Triangle Worksheet
Principia Prop. I.4
Fulatiou_Period7_TwoTransformations
การแยกตัวประกอบของพหุนามดีกรีสอง
vector_intersect_Z0_with_color_tracking_not_finished

Descubre temas

Distribución geométrica
Números Naturales
Circunferencia Circunscrita
Límites
Funciones