Loci – spiral, involute, cycloid & helix

Archimedean Spiral

http://www.graphicalcommunication.com/lessonnotes/spiral.php

Archimedean spiral notes by Ms N. Lombardi
Spiral-notes-by-Ms-N.-LombardiDownload

The Involute

Involute of a square video and exercises

http://www.graphicalcommunication.com/lessonnotes/involuteofasquare.php

Involute of a circle video and exercises

http://www.graphicalcommunication.com/lessonnotes/involuteofacircle.php

Involute notes by Ms N. Lombardi
Involute-notes-by-Ms-N.-LombardiDownload

The Cycloid

http://www.graphicalcommunication.com/lessonnotes/cycloid.php

Cycloid notes by Ms N. Lombardi
Cycloid-notes-by-Ms-N.-LombardiDownload

The Helix

Helix notes by Ms N. Lombardi
Helix-notes-by-Ms-N.-LombardiDownload
Helix revision worksheet by Mr D. Rizzo
Helix-worksheet-by-Mr-D.-RizzoDownload

PLEASE note that the PITCH mentioned in the following two videos should be replaced by LEAD.