Dilations and Symmetry Practice Test

Front

What is a dilation in geometry?

Back

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

Front

What is the scale factor in the transformation (x, y) → (3/4x, 3/4y)?

Back

3/4

Front

How many lines of symmetry does a square have?

Back

4

Front

What does it mean if a transformation is an enlargement?

Back

An enlargement means the figure is scaled up, resulting in a larger size, with a scale factor greater than 1.

Front

What does it mean if a transformation is a reduction?

Back

A reduction means the figure is scaled down, resulting in a smaller size, with a scale factor less than 1.

Front

Identify the smallest angle of rotation that maps a shape to itself.

Back

The smallest angle of rotation that maps a shape to itself is the angle at which the shape looks the same after rotation.

Front

How many lines of symmetry does a circle have?

Back

An infinite number of lines of symmetry.

Front

What is rotational symmetry?

Back

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

Front

What is the scale factor if a shape is enlarged from a size of 2 to a size of 6?

Back

The scale factor is 3.

Front

What is the scale factor if a shape is reduced from a size of 8 to a size of 4?

Back

The scale factor is 1/2.