Which of the following compositions produces the same image as R 0,-180?
1 answer:
The transformation RO - 180° means rotation of - 180°. That is half-turn clockwise. When you apply that rotation, the coordinates of a point (x,y) transforms into coordinates (-x,-y). So, any coomposition that is equivalent to half-turn will produce the same image as RO - 180°. These are some examples: 1) RO 90° and RO 90° (because 90° + 90° = 180° and that is equivalent to -180°). 2) RO - 90° and RO - 90° (because - 90° - 90° = - 180°). 3) RO 90° and RO - 270° (becasue 90° - 270° = - 180°). At the end there are infinite combinations equivalent to Ro - 180°, so, given that you did not include the set of choices, I have provided the explanations and examples which teachs you how to test any combination of rotations.
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Okay so you do 6r-8r which = -2r Then you do 5t-4t which = 1t So the answer simplified = -2r + 1t