Semejanza de triángulos
https://www.youtube.com/watch?v=KKhEv3wA7kU
https://www.youtube.com/watch?v=Gq1uyLpF_v0
https://www.youtube.com/watch?v=Pgb3H4Su1EY
https://www.youtube.com/watch?v=MZKO1qwnS4w
https://www.youtube.com/watch?v=sDH4ecxqV6o
Ángulos opuestos y adyacentes
https://www.youtube.com/watch?v=GCGNpT72moc
https://www.youtube.com/watch?v=B9Cut6Hq4ZM
https://www.youtube.com/watch?v=6IpebH-ZDSA
https://www.youtube.com/watch?v=Uxw_XeVnd2o
Teorema de Tales, ejercicios y problemas de aplicación
https://www.youtube.com/watch?v=e_MvZr2sNmo
https://www.youtube.com/watch?v=ryRPSOQQJtc
https://www.youtube.com/watch?v=ejKeW3LrLwk
https://www.youtube.com/watch?v=ifjbo-RyfNE
https://www.youtube.com/watch?v=e2SDoARhAwg
https://www.youtube.com/watch?v=vIT0bP6LoIw