OVAL, OVOID AND SPIRAL

ASSIGMENTS

PART 1. - Draw an ovoid, an oval and a spiral in the same manner that they are drawn in the picture below.

Use  graphite pencils or mechanical pencils (2H or HB)

Use a DIN A4 paper: 29,7 x 21 cm (Basik or regular paper=folio).
You will need a compass, and a set of squares or a ruler

PART 2. -Copy the outline of these shapes (2D) on a Basik paper and try to draw real objects with the same form (3D) in the same manner that is shown in this picture. i
Use colour pencils, markers, watercolours, etc.
If you are able to use the 0,8 fine liner to draw the outline that is fine  (please use the compass to do it, don´t do them freehand).

These constructions are made with GeoGebra. As you know they are interactive (you can change the position of the blue points). Don´t forget to put axis CD horizontal the way you can see on this picture.

Here you have a video in case you need it.

Oval construction given its minor axis

Ovoid construction given its minor axis

If you pay a bit of attention you will realize that we draw the ovoide the exact same way we draw the oval. 

Spiral
How to draw a involute of a triangle
Versión en español