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

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רישום חופשי
Area of a Trapezoid
Building Triangles with Set Areas

Descubrir recursos

Constellations: Big Dipper
Altıgen İnşası
Kopija The Archimedean Twins
danny 2
Why same areas? (3)
altitude

Descubre temas

Ortocentro
Diferencia y pendiente
Recta Tangente o Tangente
Distribución geométrica
Distribución normal