Question

1. which of the following transformations are rigid motions?(please pick all that are needed)A) reflectionB) dilationC) rotationD) translation

Answer 1

Answer:
 Option A. Reflection
Option C. Rotation, and
 Option D. Translation

 Rigid motion means form of motion that maintains distance. So the above mentioned forms - reflection, rotation and translation are part of rigid motion. Dilation is non rigid motion.

Answer 2

Answer:   A) reflection  C) rotation    D) translation

Step-by-step explanation:

The rigid motions are the transformations that does not change the size and the shape of figure .

It preserves the side length and interior angle measure in a figure.

There are three kinds of rigid motions  :

• Reflections : It flips a figure across a line of reflection.
• Rotations : It rotates a figure about some degrees around a center point.
• Translations : It moves figure on coordinate plane about some distance in a particular direction.

But dilation is not a rigid transformation because it mostly changes the size of the image. It basically shrink or enlarge a shape.