Question

1. which of the following best describes a rotation? a. an increase in size b. a shift straight to the side c. a turn around a point d. a flip across a line 24. which transformation can make a figure smaller or larger while keeping its shape proportional? a. translation b. reflection c. dilation d. rotation 25. what happens to a figure under a 180 - degree rotation about the origin? a. the sign of the x and y values is inverted b. it becomes larger c. it disappears d. it is flipped upside down 26. if a figure is flipped over a line, it has undergone which transformation? a. scaling b. translation c. rotation d. reflection 27. which transformation would not be considered a rigid motion because it alters the figures size? a. dilation b. translation

Explanation:

• For question 23, rotation is defined as turning around a point.
• For question 24, dilation changes the size of a figure while keeping its shape proportional.
• For question 25, in a 180 - degree rotation about the origin, the sign of the x and y - values of each point on the figure is inverted.
• For question 26, flipping a figure over a line is a reflection.
• For question 27, dilation is not a rigid motion as it changes the size of the figure.

Answer:

1. C. A turn around a point
2. C. Dilation
3. A. The sign of the x and y values is inverted
4. D. Reflection
5. A. Dilation