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22:26
Lines in a coordinate system
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Orthonormal System 2018 2nd session #math #grade9 #lebanon
34:04
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#NEW 2023 #GEOMETRY #REVISION #thale's #orthocenter #tangents #circle #parallel #ratio #math
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Revision Sample #Algebric_expression #polynomial #grade9 #math #factorize #expand #solve #lebanon
25:38
2017 First session (Orthonormal system)
52:45