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]

Nuevos recursos

General Polar Equation of Conics with Rotation (1)
bewijs stelling van Pythagoras
အခြေခံ data အခေါ်အဝေါ်များ
Perimeter of a Rectangle with Unknown Sides
Assistants (custom GPTs or Gemini Gems) for Math

Descubrir recursos

判斷球體（汽球）
Translations Practice #2
translation of square ABCD G-CO.A.2
สมการเส้นตรงสองตัวแปร

Descubre temas

Parábola
Triángulos Equiláteros
Ángulos
Inecuaciones
Segmento Mediana