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]

Nuove risorse

bewijs stelling van Pythagoras
Reflection Across 2 Parallel Lines
Triangle with 3 Right Angles
רישום חופשי
Locus Related to Descartes' Folium

Scopri le risorse

အလင်းယိုင်ခြင်း
trapezium diagonal
Ptolemy Application 1
okrag wpisany i opisany michal cukrowski

Scopri gli argomenti

Perimetro
Matrici
Diagrammi
Numeri razionali
Circonferenza unitaria