Question

Which of the following is an equivalent transformation to rotation of an object clockwise 90 degrees?

A) Rotation about the origin of 270 degrees counterclockwise
B) Rotation about the origin of 90 degrees counterclockwise
C) Rotation about the origin of 270 degrees clockwise
D) Rotation about the origin of 180 degrees counterclockwise

Answer 1

Given a point (−7, 4) on a geometric figure, what is the new point after rotating the figure 90 degrees counterclockwise?

Answer 2

B) Rotation about the origin of 90 degrees counterclockwise

Answer 3

To rotate a point counter-clockwise by 90 degrees, we swap the x and y coordinates and negate the new x-coordinate.

Therefore, the new point would be (4, 7).