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
bewijs stelling van Pythagoras
兩位數的位值
Average Value of a Function
Billard V5.2 and V6

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Week 2 - Common Tangents of Two Circles
simmetriafunzione
true/translate-by-vector2.ggb
Quadratic Basketball 1
Unit 11 test problem #1
Translation cms

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Función lineal
Números Naturales
Términos
Homotecia
Triángulos Escalenos