If this attribute is not specified, this <input> element must be a descendant of a <form> element. This attribute enables you to place <input> elements anywhere within a document, not just as descendants of their form elements.
A circular area of 5 miles radius covers 50265.5 acres (to 1 dp) Area = pi*radius2, which with radius in miles will give you area as 78.53982 square miles, then multiply by 64 â¦ 0, since there are 640 acres in 1 square mile.
Area of a circle = (pi) R2 = (pi) (1)2 = (pi) square miles. 1 square mile = 640 acres. (pi) square miles = 640 (pi) = 2,010.62 acres (rounded) Area of a circle = (pi) R2 = (pi) (1)2 = (pi) square miles.