It was the mark decided upon in 1876 by the United Kingdom Merchant Shipping Act
Chat with our AI personalities
Power
Hammer a wooden peg and attach an 8 foot thin rope to the peg. Fasten a spike on the other end (to scrape the circle on the ground). After ensuring the distance between the centre peg and the spike is 8 feet in length, keeping the rope taut, use the spike to mark the ground in a circle.
Treat the 3D sphere as a 2D circle. The radius for the sphere is the same radius as for the circle. No matter where on the sphere you place a mark, the distance (radius) from the mark to the centre of the sphere will always be the same as the circle.
registered trade mark ®
Draw a diameter on the circle from A to B and mark the midpoint, C (center of the circle). Mark the midpoint, D, of one of those radii (halfway between center and edge). Draw a perpendicular line to the diameter from D to the two edges of the circle, E and F. Draw radii from E to C and F to C. Lines AC, EC, and FC mark the three equal parts of a circle.