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
Ángulo interno y externo de un triángulo
https://www.youtube.com/watch?v=RIIx0r3V7Yw
https://www.youtube.com/watch?v=s1tTky69KVg
https://www.youtube.com/watch?v=ec4yMbCUn7w
https://www.youtube.com/watch?v=Rb-rg4Vqthw
https://www.youtube.com/watch?v=UcLiO6yLJ3s
Teorema de Pitágoras, ejercicios y problemas de aplicación
https://www.youtube.com/watch?v=Pm_ncQVCWlA
https://www.youtube.com/watch?v=EGQ_NQcAy28
https://www.youtube.com/watch?v=6B_HfguNOPo
https://www.youtube.com/watch?v=hyaLHl0to9w
https://www.youtube.com/watch?v=CapvwV4CcJU
https://www.youtube.com/watch?v=qhczE4nhiQM
https://www.youtube.com/watch?v=edN40DAZopQ
Ejercicios con polígonos regulares
https://www.youtube.com/watch?v=ku_GwiCfIpk
https://www.youtube.com/watch?v=X5PQD9r41Zg
https://www.youtube.com/watch?v=uG5yOk0FZpI
https://www.youtube.com/watch?v=1tTkjo1sAI0
https://www.youtube.com/watch?v=RZDiDTaZTB0
https://www.youtube.com/watch?v=s4l-jE3RhVg
https://www.youtube.com/watch?v=sKPZSyk4rGg
https://www.youtube.com/watch?v=8-YOBRSsqpE