[youtube]https://www.youtube.com/watch?v=ZXORAL3BJG0&ebc=ANyPxKqvEKHqes-hhstTLmZvUF91UOBrMSPsWbnaHR3o03kErDaYsYMmTqyN3gl_jQC7RIDopOXY[/youtube]
Construcció de triangles
Respon
[youtube]https://www.youtube.com/watch?v=ZXORAL3BJG0&ebc=ANyPxKqvEKHqes-hhstTLmZvUF91UOBrMSPsWbnaHR3o03kErDaYsYMmTqyN3gl_jQC7RIDopOXY[/youtube]
[youtube]https://www.youtube.com/watch?v=4isAvTsoHHU[/youtube]