Thanks for your interest in this course! This engaging and interactive learning experience includes videos, quizzes, discussions, polls and other powerful lessons that will help you better understand this topic.

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This is the 2nd Part of a Continuation Course of Geometry in moving pictures or short videos, all computer generated; you can watch - free of charge - the Episodes 6 to 11 in Youtube by typing Geometry re-experienced and you can see how things are handled in this course AND you may watch the 1st Episode of this Course (no. 6) for free. So please turn in!

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We found this wonderful property by trying numerous times and here is the place to prove it; the same is true for the sum of the inner angles

In any triangles there are for instance angle bisectors which intersect in one point and this is true for the other 3 special lines too. It's incredible but we can prove it.

Did you ask yourself how double reflections could be proceeded depending on the situation of the 2 axes? Here comes the answer!

How can we decide whether 2 triangles can be made superposing each other? The 4 cases of Congruence yield the answer - and they allow us to construct triangles with 3 given sides or angles.

Get to know what types of quadrilaterals exist, how they can be generated from the square with adequate conditions and learn how to construct some of them

We are eager to get to know the formulae for the different types of special quadrilaterals and we achieve this goal by converting them to our known rectangle

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Als Mathelehrer, Buch- und DVD-Autor biete ich online Videokurse zur Geometrie an, damit ihr sie neu erleben und besser verstehen könnt. As a teacher of Mathematics, author of books and DVDs I offer you Video Courses to re-experience Geometry and help you to understand.