Square RSTU shown above is rotated in a plane about its center in a clockwise direction the minimum number of degrees necessary for S to be in the position where U is now shown. The number of degrees through which RSTU is rotated is	Choose one:  A) 180 degree  B) 160 degree  C) 225 degree  D) 270 degree  E) 315 degree
From the options, I am assuming the positioning of U and S relative to each other to be as shown. To replace U by S, focus on OS. Say, you rotate OS clockwise (and with it the entire square) and bring it in place of OU. How many degrees did you go? You covered 2 right angles i.e. 180 degrees.   180 degreenswer : 180 degree
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Square RSTU shown above is rotated in a plane about its center in a clockwise direction the minimum number of degrees necessary for S to be in the position where U is now shown. The number of degrees through which RSTU is rotated is