Sign in
Search
GeoGebra
Home
Resources
Profile
Classroom
App Downloads
Lesson 86. Properties of Parallel Lines
Author:
Norm Prokup
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
גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
bewijs stelling van Pythagoras
Shells
Reflection across a line
Equation of Locus - Parabola
Discover Resources
Lesson 15 Parallels
leftHandTrig_4_2a
Juggling in an equilateral triangle - route 3
Right Triangle to Circle Demo
Nets of 3D solids
PeterRhombus
Discover Topics
Diagrams
Differential Calculus
Equilateral Triangles
Curve Sketching
Boxplot