Dilations

True of False: When you shrink a figure, you multiply by a fraction. 

• true

• false

If a rectangle is drawn and another rectangle is drawn so that the sides are twice as big as the first rectangle, what happens to the area?

• doubles

• triples

• quadruples

• not enough information

Dilations are ________ but not congruent.

• Similar

• Flipped

• Rotated

• Congruent

Dilations will always keep the same ________

• Orientation

• Size

• Area

• Perimeter

When you dilate, you ______ x and y by a number.

• Multiply

• Add

• Subtract

• Divide

If k=1.25 (k is scale factor), then a dilation will result in a(n)______

• reduction

• enlargement

• scale factor

• center of dilation

Find the measure of x:

• 6

• 24

• 33

• 36

The __________ is the ratio of a length of the image to the corresponding length on the original figure.

• reduction

• enlargement

• scale factor

• center of dilation

Enlargement or reduction?  Find the scale factor!

• It's a reduction; the scale factor is 2.

• It's an enlargement; the scale factor is 2.

• It's an enlargement; the scale factor is 1/2.

• It's a reduction; the scale factor is 1/2.

Triangle ABC will be dilated by a scale factor of 1/2.  What will be the coordinates of C'?

• (-1, -2.5)

• (12, 6)

• (3, -1.5)

• (0, 1.5)