is a quadrilateral with two pairs of adjacent sides equal in length,
and one of whose interior angles is a reflex angle. The diagonal
through this angle is a line of symmetry for the shape. A normal
arrow consists of a shaft with an arrowhead attached to the front
end, with fletchings and a nock at the other.
Arrow sizes vary greatly across cultures, ranging from eighteen
inches to five feet (45 cm to 150 cm). However, most modern
arrows are two-and-a-half to three feet long (75 cm to 90
cm), similar to the length of English war arrows (which were
made to be half the height of the man who shot them). Very
short arrows have been used, shot through a guide attached
either to the bow (an overdraw) or to the archer's wrist (the
Turkish siper). These may fly farther than heavier arrows,
and an enemy without suitable equipment may find himself unable
to return them.