what form of measurement does the uk use
Imperial units British law now defines each imperial unit in terms of the metric equivalent. The metric system is in official use within the United Kingdom for most official applications with Imperial units remaining in widespread use amongst the public.[36] All UK roads use the imperial system except for weight limits, and newer height or width restriction signs give metric alongside imperial.[37]
My Ántonia
Ä Ä (lower case ä) is a character that represents either a letter from several extended Latin alphabets, or the letter A with an umlaut mark or diaeresis.
Pi Ï€ is commonly defined as the ratio of a circle's circumference C to its diameter d:[9]