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Check out the class on triangles with Math teacher Osni Júnior. Skills worked on: Identifying triangles and their properties. Identifying the sum of the internal angles of a triangle equal to 180. Recognizing, using a protractor or dynamic geometry software, that any external angle of a triangle is equal to the sum of the non-adjacent internal angles, without necessarily using this nomenclature. Learn more and check out the full Rioeduca on TV schedule at: http://multi.rio/rioeducanatv ========================================= Access MultiRio products whenever you want! On TV: channel 26 and HD channel 526 on NET-Rio Watch our online programming: https://tinyurl.com/cj7rsyy4 MultiRio Portal: http://www.multirio.rj.gov.br/ ======================================= Check out MultiRio's profiles on social media: http://www.fb.com/multirio / multirio / multirio_oficial