Unit 9 Retest

Front

What is a dilation in geometry?

Back

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

Front

What does a scale factor greater than one indicate in a dilation?

Back

It indicates that the dilation is an enlargement.

Front

What are the coordinates of a point (x, y) after a 90° clockwise rotation?

Back

The new coordinates will be (y, -x).

Front

What are the coordinates of a point (x, y) after a 180° clockwise rotation?

Back

The new coordinates will be (-x, -y).

Front

How many lines of symmetry does a shape have if it has 0 lines of symmetry?

Back

It means the shape cannot be folded in half to create mirror images.

Front

What is the transformation rule for translating a point (x, y) by (x+8, y+4)?

Back

It means to move the point 8 units to the right and 4 units up.

Front

What is the result of a 90° counterclockwise rotation of point (x, y)?

Back

The new coordinates will be (-y, x).

Front

What is the definition of symmetry in geometry?

Back

Symmetry is when a shape can be divided into parts that are arranged in a balanced and proportional manner.

Front

What is the effect of a scale factor less than one in a dilation?

Back

It indicates that the dilation is a reduction.

Front

How do you determine the number of lines of symmetry in a regular polygon?

Back

A regular polygon has as many lines of symmetry as it has sides.