Question

A triangle is rotated 90° about the Oregon. which rule describes the transformation?

A= (x,y) —> (-x,-y)
B= (x,y) —> (-y,x)
C= (x,y) —> (-y,-x)
D= (x,y) —> (y,-x)

Answer 1

the answer is D :) . just to help you out, here are the rules for clockwise rotation

90* (y,-x)
180* (-x,-y)
270* (-y,x)

for counter clockwise the rules are


90* (-y,x)
180* (-x,-y)
270* (y,-x)