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
Defacement (flag) football supporters travelling abroad for a match to bring a national flag defaced with the name of their hometown or a similar local identifier. Defacement (flag) Defacement, in heraldry and vexillology, is the addition of a symbol or charge to another flag. For example, the New Zealand flag is the British Blue Ensign defaced with a Southern Cross in the fly. In the context of vexillology, the word "deface" carries no negative connotations, in contrast to general usage. It simply indicates differentiation of the flag from that of another owner by addition of elements. For example, many state flags are