Square ABCD shown above is rotated in a plane about its center in a clockwise direction the minimum number of degrees necessary for C to be in the position where B is now shown. The number of degrees through which ABCD is rotated is	Choose the correct answer: A) 135 degree B) 180 degree C) 225 degree D) 315 degree E) 270 degree
From the options, I am assuming the positioning of B and C relative to each other to be as shown. To replace B by C, focus on OC. Say, you rotate OC clockwise (and with it the entire square) and bring it in place of OB. How many degrees did you go? You covered 3 right angles i.e. 270 degrees.   Answer : 270 degree
<result>E</result>
Square ABCD shown above is rotated in a plane about its center in a clockwise direction the minimum number of degrees necessary for C to be in the position where B is now shown. The number of degrees through which ABCD is rotated is