Unit 9 Retest

Front

What happens to a shape when a dilation has a scale factor greater than one?

Back

The dilation results in an enlargement of the shape.

Front

What happens to a shape when the scale factor of a dilation is less than one?

Back

The dilation results in a reduction of the shape.

Front

What are the coordinates of a point C after a rotation of 180° clockwise if the original coordinates are (3, 1)?

Back

The new coordinates C' will be (-3, -1).

Front

How many lines of symmetry does a shape have if it has no lines of symmetry?

Back

The shape has 0 lines of symmetry.

Front

Which letter has ONLY rotational symmetry?

Back

The letter 'S' has only rotational symmetry.

Front

Define dilation in geometry.

Back

Dilation is a transformation that alters the size of a shape but not its shape.

Front

What is the scale factor in a dilation?

Back

The scale factor is the ratio of the length of a side of the image to the length of the corresponding side of the original shape.

Front

What is rotational symmetry?

Back

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

Front

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

Back

Count the number of ways you can fold the shape so that both halves match exactly.

Front

What is the effect of a scale factor of 1 in a dilation?

Back

A scale factor of 1 means the shape remains the same size; it is neither enlarged nor reduced.