Unit 3 Lessons 4&5 Dilation and Scale Factor Extra Practice

Front

What is dilation in geometry?

Back

Dilation is a transformation that alters the size of a figure but not its shape, using a center point and a scale factor.

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, the dimensions of a figure during a dilation.

Front

If Triangle ABC is dilated to Triangle DEF, what happens to the angles?

Back

The angles remain the same; they are congruent.

Front

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

Back

The figure enlarges.

Front

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

Back

The figure shrinks.

Front

What is the measure of Angle D if Angle A is 77 degrees in a dilation?

Back

Angle D is also 77 degrees.

Front

How do you determine if two triangles are dilations of each other?

Back

Check if the corresponding angles are equal and the scale factors are consistent.

Front

What is the scale factor if Triangle DEF is 1.5 times larger than Triangle ABC?

Back

The scale factor is 1.5 or 3/2.

Front

What is the scale factor if Triangle ABC is 0.75 times the size of Triangle YXZ?

Back

The scale factor is 0.75.

Front

If Triangle NOP is dilated to Triangle N'O'P', what can be said about their angles?

Back

The angles are congruent; if Angle N'O'P' is 41 degrees, then Angle NOP is also 41 degrees.