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1. Which of the following properties do not change under a
size transformation? Explain how you can be sure of your
answers.
a. Distance between points
b. Angle measure
c. Parallelism; that is, if two lines are parallel to each
other, then their images are parallel to each other.
Solution
(a) does change. Take two perpendicular lines, and take a point on each. Cut the
size of the line in half. The points will move closer to each other. (b) does not change. The angle
measure of a shape is always dependent on the ratio of the sides, not the magnitude of the sides
themselves. (c) does not change. Changing the length of parallel lines still leaves them parallel.

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1. Which of the following properties do not change under a size tr.pdf

  • 1. 1. Which of the following properties do not change under a size transformation? Explain how you can be sure of your answers. a. Distance between points b. Angle measure c. Parallelism; that is, if two lines are parallel to each other, then their images are parallel to each other. Solution (a) does change. Take two perpendicular lines, and take a point on each. Cut the size of the line in half. The points will move closer to each other. (b) does not change. The angle measure of a shape is always dependent on the ratio of the sides, not the magnitude of the sides themselves. (c) does not change. Changing the length of parallel lines still leaves them parallel.