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
רישום חופשי
Perimeter of Rectangle
Building Triangles with Set Areas
Rectangle Construction Template (V2)
အခြေခံ data အခေါ်အဝေါ်များ
Discover Resources
Untitled
Indices
Farmer and his fence
htsdmn
Translations
Discover Topics
Square
Secant Line or Secant
Arithmetic
Calculus
Combinatorics