Question

Siobhan rotates a right triangle 90° counterclockwise about the origin. How does the orientation of the image of the triangle compare with the orientation of the preimage?

A. It is mirrored horizontally.

B. It is mirrored vertically.

C. It is rotated 90° clockwise.

D. It is rotated 90° counterclockwise

Answer 1

When a right triangle is rotated 90° counterclockwise about the origin, its orientation changes from its original position to a position that is turned 90° to the left, while maintaining its shape and size.

Step-by-step explanation:

The question involves a right triangle being rotated 90° counterclockwise about the origin. The orientation of the image compared to the preimage after this rotation would be as if the triangle were turned 90° to the left of its original position. This means the triangle will have the same shape and size, but its orientation is changed. Option D, 'It is rotated 90° counterclockwise,' is the correct answer as it describes exactly what happens to the triangle's orientation after such a rotation.