Dilations and other transformations

Front

What is a transformation in geometry?

Back

A transformation is an operation that moves or changes a shape in some way to produce a new shape.

Front

Name the four types of transformations.

Back

Translation, Reflection, Rotation, Dilation.

Front

What is a dilation?

Back

A dilation is a transformation that changes the size of a shape but not its shape.

Front

What does the scale factor (SF) indicate in a dilation?

Back

The scale factor indicates how much the shape is enlarged or reduced.

Front

If the scale factor is greater than 1, what type of dilation is it?

Back

Enlargement.

Front

If the scale factor is less than 1, what type of dilation is it?

Back

Reduction.

Front

How do you calculate the scale factor when dilating a point?

Back

Divide the coordinates of the dilated point by the coordinates of the original point.

Front

What is the scale factor if the original point is (4, 6) and the dilated point is (2, 3)?

Back

1/2.

Front

What is a reflection in geometry?

Back

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

Front

What is a rotation in geometry?

Back

A rotation is a transformation that turns a shape around a fixed point.