Dilations
Scale Factors
Proportions
Similar Figures
100
Dilate this point by a scale factor of 3: (-2,5)
(-6,15)
100
What is the scale factor from Triangle PRQ to Triangle SUT?
3/2
100
g=6
100
The figures are similar. What is the measure of u?
u=2
200
Dilating to make something smaller is a _____________ and dilating to make something bigger is called ______________.
reduction; enlargement
200
What is the scale factor from the bigger figure to the smaller figure?
5/2 or 2.5
200
On a map, 1.5 inches is 6 miles. If the distance from Crossfield to Rachel Carson is 1 inch, how many miles is it?
4 miles
200
Given the figure, line segment CB corresponds with what line segment?
Line segment RQ
300
True or False: Dilating by a scale factor of 1 or less results in a reduction.
False! Scale factor of 1 = congruent
300
3
300
Amy earned $25 for babysitting after 2 hours. At this rate, after 9 hours, how much will she earn?
$112.50
300
What is the measure of y?
y=25
400
Dilate by a scale factor of 3/4: (12, -8)
(9, -6)
400
What is the scale factor from the bigger figure to the smaller figure?
2/3
400
Marcello is on a road trip and drives 150 miles in 3 hours. At the current rate, how many miles would he have driven in 7 hours?
350 miles
400
What is the measure of line segment BC?
9cm
500
Dilate by a scale factor of 0.2: (-10, 15)
(-2, 3)
500
What is the scale factor from the smaller figure to the bigger figure?
3
500
What's the difference between a ratio and a proportion?
Ratio = comparison of 2 quantities
Proportion = 2 equal ratios
500
Are the figures similar? How do you know?
They are NOT similar because Angle B is 41 degrees and Angle F is 78 degrees.