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

Prism Drawn in 1-Point Perspective
גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
Volume by Shells Around y
Triangle with 3 Right Angles
Reflection across a line

Discover Resources

Solving Quadratic Equations
true/isogonals1.ggb
Limits graph
สำเนาของ fraction division:　a ÷ b (partitive)
picture

Discover Topics

Polygons
Quadrilaterals
Circle
Linear Equations
Standard Deviation