This document provides instructions for drawing an ovoid shape upon its largest axis in 7 steps: 1) Divide the given axis AB into six equal parts. 2) Retain points 2 and 5 and discard the others. Draw a perpendicular line from point 2. 3) Draw a green circle from point 2 with radius 2A and a red semicircle from point 2 with radius 2B to find points C,D,E,F. 4) Join points E and F to point 5, extending the lines until the red semicircle. 5) Draw arches from E and F with radii ED and FC until the black lines, finding points P and Q. 6) Draw a circle

1. This presentation has been made for you by
FRANCISCO GUIJARRO BELDA
From Isaac Albéniz Secondary School
Leganés. Madrid. Spain.

2. HOW TO DRAW AN OVOID UPON ITS LARGEST AXIS
1) Let´s imagine AB is the given axis. You have to divide this segment into six equal
parts by means of the Thales Theorem (if you don´t remember how to work it, go to
1 Term Theory page on the blog and review everything)

3. 2) Points 2 and 5 are crucial to the process. Keep them and get rid of the rest. Draw a
line perpendicular to AB from point 2

4. 3) Draw a circle (green color) with center in point 2 and radius 2A, you will get points
C and D. Draw a semicircle (red color) with center in point 2 and radius 2B, you will
get points E and F

5. 4) Join points E and F to 5 and extend these lines until the red semicircle

6. 5) Draw two arches from points E and F and radius ED and FC until the black lines you
had already drawn (in pink color in the image below). You will get points P and Q

7. 6) Join points P, Q and B by means of a circle with center in 5 and radius 5P, 5Q or 5B

8. 7) Get rid of everything you don´t need any more and you are done. Your beautiful
egg should look like the one you have here below