Question

Triangle RST and its image, triangle R’S’T’, are graphed on the coordinate grid below.

Which Rotation, using the origin as the center of rotation, transformer R’S’T’?

A) a 90 degree clockwise rotation
B) a 90 degree counterclockwise rotation
C) a 45 degree clockwise rotation
D) a 45 degree counterclockwise rotation

Answer 1

A) 90 degree clockwise rotation

Answer 2

Option A is correct - a 90 degree clockwise rotation

Explanation:

Here in the given image, we can assume that RT and corresponding R'T' to be the base of the triangle.

B- a 90 degree counterclockwise rotation - If the figure would have been rotated counterclockwise, the base would have been TS which is not in the corresponding image. So this option is wrong.

C- If it were 45 degrees then the base would have been RS not RT so this is also wrong.

D - this is also wrong as the bases do not match.

Hence, option A is correct.