Dilations
Triangles
Similar
Slope
100

True or False

Dilations ONLY increase (enlarge)

False

Dilations can increase or decrease in size

100

Triangles measure ______ degrees

180

100

What two things are needed for two polygons to be similar?

SAME scale factor and angle measurements

100

How do you find slope?

vertical / horizontal or rise / run

200

True or False 

Dilations take parallel lines and make them perpendicular

False

Lines STAY THE SAME

200

Are the triangles similar? How do you know?

Yes! The angle measures are the SAME

200

Are the triangles similar? How do you know?

Yes! The angle measurements are the same!

200

What is the slope of the line?

3/6 or 1/2

300

Finish the sentence:

After a dilation, angle measurements __________.

STAY THE SAME

300

What is the missing angle measurement?

70 + 50 + ___ = 180

120 + ____ = 180

180 -120 = 60 degrees

300

Are the polygons similar? Explain.

No! The angle measurements are different

300

What is the slope of the line?

4/3

400

True or False: The dilated triangle is SIMILAR to the preimage

TRUE

400

What is the missing side length?

25 ft

400

Triangle DEF is the ORIGINAL triangle. Which triangle has a scale factor GREATER than 1?

Triangle GHI

400

What is the slope of the line?

2 / 4 or 1 / 2

500

Are the dilated triangles CONGRUENT?

NO, they are a different size. They are similar

500

Are the triangle similar?

YES!! 


500

The triangles are similar. What is the length of x?

5

3 / 12 = 0.25 (scale factor)

20 x 0.25 = 5

500

Does this line show the slope of 2?

YES! 2 / 1 = 2