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

Pitfalls of Disk/Washer Method
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bewijs stelling van Pythagoras
Shells
Volume by Shells Around y

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labyrinthe
Ángulos congruentes
#1) The three excircles of triangle ABC will be tangent to the (non-extended) sides at three points.
chord4
Sierpinski Triangle
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CIRCLES 8

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Sections Coniques
Expériences Aléatoires
Trigonometrie
Régression Linéaire
Statistiques