British flag theorem British flag theorem In Euclidean geometry, the British flag theorem says that if a point "P" is chosen inside rectangle "ABCD" then the sum of the squared Euclidean distances from "P" to two opposite corners of the rectangle equals the sum to the other two opposite corners. As an equation: The theorem also applies to points outside the rectangle, and more generally to the distances from a point in Euclidean space to the corners of a rectangle embedded into the space. Even more generally, if the sums of squared distances from a point "P" to the two pairs of opposite
Flag of the United States author and U.S. naval officer George H. Preble: In the above quote, the Chinese words are written phonetically based on spoken Cantonese. The names given were common usage in the nineteenth and early twentieth centuries. Vietnam has borrowed the term for the United States, as or ("Flower Flag") in Vietnamese language. Chinese now refer to the United States as . "Měi" is short for "Měilìjiān" (, phono-semantic matching of "American") and "guó" means "country", so this name is unrelated to the flag. However, the "flower flag" terminology persists in some places today: for example, American Ginseng is called "flower flag