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