Transformations Review

Front

What mathematical operation is used with the scale factor in a dilation?

Back

Multiplication

Front

What is a dilation?

Back

Either an enlargement or a reduction.

Front

What is the rule for rotating a point 180° clockwise?

Back

(x,y)→(-x,-y)

Front

What is the image of the point (-5,8) after rotating it 90 degrees clockwise around the origin?

Back

(8,5)

Front

What is the rule for rotating a point 270° counterclockwise?

Back

(x,y)→(y,-x)

Front

What is a transformation in geometry?

Back

A change in position, size, or shape of a figure.

Front

What are the four types of transformations?

Back

Translation, Rotation, Reflection, Dilation.

Front

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

Back

It results in an enlargement.

Front

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

Back

It results in a reduction.

Front

How do you perform a reflection over the x-axis?

Back

Change the sign of the y-coordinate: (x,y)→(x,-y).