Question

Carlos performed a transformation on trapezoid EFGH to create E′F′G′H′ as shown in the figure below.

What transformation did Carlos perform to create E′F′G′H′?

rotation of 90 degrees clockwise about the origin

rotation of 90 degrees clockwise about the center of the figure

rotation of 90 degrees counterclockwise about the origin

rotation of 90 degrees counterclockwise about the center of the figure

Answer 1

@estudier

Answer 2

@phi

Answer 3

it's definitely around the origin. You know which way the hand on a clock goes, right?
90 degrees is 1/4 of the way around a circle. You can figure out if it move clockwise or counter clockwise.

Answer 4

am guessing clockwise..

Answer 5

don't guess
http://en.wikipedia.org/wiki/Clockwise

You have a choice of 2 directions, and you want to take the direction that is shortest.