The perimeter of a square circumscribed about a circle of radius r is: Select
A) 2r  B) 4r  C) 6r  D) 9r  E) 8r
8rach side of the square = 2r   Perimeter of the square = (4×2r) = 8r   Answer is 8r.
<result>E</result>
The perimeter of a square circumscribed about a circle of radius r is: