Dilations Similarity

State the coordinate of the image of point B (-10,-6) after a dilation with a scale factor of 1/2.

• (5,3)

• (20,12)

• (-20,-12)

• (-5,-3)

Choose the correct scale factor:

• 2.5

• 1.5

• 3.5

• 4

The two triangles are similar. Solve for X.

• 2 ft

• 3 ft

• 4 ft

• 6 ft

A ~ B. What is the scale factor of the dilation of A to B?

• 3

• 4

What is the scale factor from triangle ABC to triangle DEF?

• 1/2

• 7/3

• 2/1

• 10/3

What is the scale factor of the dilation of ABC to XYZ?

• 2

• 3

What is the scale factor from ABCD to MNOP?

• 2/3

• 3/2

• 2

• 3

What is Dilation?

• Dilation means to enlarge or reduce a shape

• Dilation means to flip over a line

• Dilation means two figures that look alike

• Dilation means to make a shape smaller

If two figures are similar, the corresponding angles are...

• Congruent

• Supplementary

• Proportional

• Different

How does a dilation change the angles of a polygon?

• It changes by the scale factor.

• Dilations do not change the angles.

• It is impossible to answer this question.  The angles change unpredictably.

• The angles all change to larger angles.