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]

New Resources

bewijs stelling van Pythagoras
How to Draw a Cube in 2D
גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
Portions of a Sphere
Two Triangle Theorem

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game with mario and balls
percen
Hyperbolic Angle Bisector (2014 Exam Q7)
Parallel Lines
Abwandlungen der Normalparabel

Discover Topics

Pythagoras or Pythagorean Theorem
Trigonometry
Combinatorics
Curve Sketching
Conic Sections