Unit 4 Transformations Test Review

Front

What is a reflection in geometry?

Back

A reflection is a transformation that flips a figure over a line, creating a mirror image.

Front

How do you reflect a point over the x-axis?

Back

To reflect a point (x, y) over the x-axis, the new coordinates become (x, -y).

Front

What are the new coordinates of point (4, -6) after reflecting over the x-axis?

Back

(4, 6)

Front

What is a translation in geometry?

Back

A translation is a transformation that moves a figure a certain distance in a specified direction.

Front

If a figure is translated 5 units to the right and 2 units up, how do you find the new coordinates?

Back

Add 5 to the x-coordinate and 2 to the y-coordinate of each point.

Front

What are the new coordinates of point (2, 1) after translating 5 units right and 2 units up?

Back

(7, 3)

Front

What is rotational symmetry?

Back

Rotational symmetry is when a figure can be rotated around a center point and still look the same at certain angles.

Front

What is reflectional symmetry?

Back

Reflectional symmetry is when a figure can be divided into two identical halves that are mirror images of each other.

Front

What is a dilation in geometry?

Back

A dilation is a transformation that changes the size of a figure but not its shape, using a scale factor.

Front

How do you find the scale factor of a dilation?

Back

The scale factor is found by dividing the length of a side of the image by the length of the corresponding side of the original figure.