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]

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Circle Passing Through 3 Points
Volume by Shells Around y
apec
רישום חופשי
Pitfalls of Disk/Washer Method

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Circle equidistant thing
Reflection 2
Det dobbelttydige tilfælde
Rotação dos eixos
مناطق 8 2017

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Percentuali
Rotazione
Piani
Circonferenza
Equazioni di 2° grado