9 dots, 10 circles
- Author:
- GeoGebra Institute of MEI, Tom Button
The 3×3 grid of dots are spaced one unit apart (vertically and horizontal).
Construct circles with radius √1, √2, √3, √4, √5, √6, √7, √8, √9 and √10 with a pair of compasses using just these points or any intersection points of circles created.
This is adapted from a problem by Ed Southall: https://twitter.com/edsouthall