Moss's egg explained

In Euclidean geometry, Moss's egg is an oval made by smoothly connecting four circular arcs. It can be constructed from a right isosceles triangle ABC with apex C.

To construct Moss's egg:^{[1] [2] [3]}

• Draw a semicircle on the base AB of the triangle, outside of the triangle.
• Connect it to a circular arc centered at B from A to a point D on line BC, and by another circular arc centered at A from B to a point E on line AC.
• Complete the oval by a circular arc centered at C, from D to E.

External links

• Video: How to draw an egg, The Aperiodical

Notes and References

1. Book: Dixon. R. Mathographics. 1991. Dover. 5.
2. Web site: Weisstein. Eric. Math World. Wolfram MathWorld. Wolfram Math World. 19 August 2015.
3. Web site: Hreinsdóttir. Freyja. Euclidean Eggs. https://web.archive.org/web/20200618202007/https://www.dynamat.oriw.eu/upload_pdf/20121022_154322__0.pdf. 2020-06-18. dead.