90 clockwise5/18/2023 ![]() Multiple Choice Use the figure to answer questions 1–3. Which of the following points could be another vertex? One vertex is at the point left-parenthesis negative 1 comma 1 right-parenthesis, and another vertex is at the point left-parenthesis 2 comma 4 right-parenthesis. What is the length of the path the laser takes? The laser reflects off the sides of the square, until it hits another vertex, at which point it stops. A laser is shot from vertex A of square ABCD of side length 1, towards point P on BC so that BP = 3/4.I hope that helps a bit more, I feel like my explanation was insufficient. ![]() In the other direction, it would have turned into (-2,-1). For example, (1,2) rotated 90° counterclockwise (going from 1st to 2nd quadrant) will turn into (-2,1). So for any (a,b), in which they are both positive (meaning the point is in the first quadrant), you can just change the signs into whatever signs the next quadrant has when the rotations are 90° angles, and invert the numbers. Its a really simple thing when there are no zeros in the point's coordinate. Maybe draw lines to them from the origin and see the angles that are formed. Plot those points and see what they look like. Another such rotation,it would end up at (-1,0), another one at (0,1), and a 4th one would bring it back to (1,0). Say you have point (1,0), and you rotate it 90° clockwise around the origin. So I'm gonna assume you know clockwise and counterclockwise, I would hope. You wanna know how to solve mathematicaly. Don't do the string thing, it's not practical.
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