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Lesson 86. Properties of Parallel Lines
Autor:
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]
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Model sferyczny - sześcian-ośmiościan
גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
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Trefoil Knot
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Theorem 14
: Applet for demonstrating Steiner’s theorem for trapezoid
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koriecedre - parallelogram
congruent figures3
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Punts singulars
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