a rectangular window is twice as long as it is wide . if its perimeter is 18 feet , then what are its dimensions in feet ?
let x be the width of the window . then the length is 2 x . x + 2 x + x + 2 x = 18 6 x = 18 x = 18 / 6 = 3 the width is 3 and the length is 6 . the answer is d .
rectangle_perimeter(18, const_deg_to_rad)