British flag theorem that and by a similar argument the squared lengths of the distances from "P" to the other three corners can be calculated as Therefore: This theorem takes its name from the fact that, when the line segments from "P" to the corners of the rectangle are drawn, together with the perpendicular lines used in the proof, the completed figure somewhat resembles a Union Flag. 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
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