Chapter 14: Q18. (page 579)
Sketch each figure on the chalkboard. With a different color, sketch its image, using the dashed line as the line of reflection.

Short Answer
The reflected figure is,

Chapter 14: Q18. (page 579)
Sketch each figure on the chalkboard. With a different color, sketch its image, using the dashed line as the line of reflection.

The reflected figure is,

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Why are the measures of the angles that the initial light ray and the reflected light rays make with the mirrors in the diagram of the periscope on the previous page?
ABCDis a trapezoid. Describe a way of mapping each point of to a point of so that the mapping is one-to-one. Is your mapping an isometry?

Write the coordinates of the image of each point by reflection in,
Point B.

Write the coordinates of the image of each point by reflection in,
Point E.

If a transformation maps two parallel lines to two image lines that are also parallel, we say that parallelism is invariant under the transformation. Is parallelism invariant under a reflection?
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