Intro To Dilations

Front

What is a dilation in geometry?

Back

A dilation is a transformation that alters the size of a figure but keeps its shape, using a center of dilation and a scale factor.

Front

What is the scale factor in a dilation?

Back

The scale factor is a number that describes how much a figure is enlarged or reduced during a dilation.

Front

If the scale factor is less than 1, what happens to the figure?

Back

The figure is reduced in size.

Front

If the scale factor is greater than 1, what happens to the figure?

Back

The figure is enlarged.

Front

What is the center of dilation?

Back

The center of dilation is a fixed point in the plane about which all points of a figure are expanded or contracted.

Front

How do you determine the new coordinates of a point after dilation?

Back

Multiply the original coordinates by the scale factor.

Front

What is the effect of a scale factor of 1 on a figure?

Back

A scale factor of 1 means the figure remains the same size.

Front

What does it mean for two angles to be congruent?

Back

Two angles are congruent if they have the same measure.

Front

In a dilation, what happens to parallel lines?

Back

Parallel lines remain parallel after a dilation.

Front

What is the relationship between the angles formed by a transversal and parallel lines?

Back

Angles formed by a transversal cutting parallel lines can be congruent or supplementary.