Similar Figures
Dilations
Slope
Is the point on the line?
Unit 1 Review
100
Corresponding angles in similar figures are ________.
equal, the same
100
If you dilate a shape with a scale factor greater than 1, the image gets _________.
larger
100
What quality of a line does slope measure?
steepness
100
Does the point (3,9) fall on the line? Show your work.
No
100
Congruent figures have the exact _____ and _____.
shape and size
200
Triangles ABC and DEF are similar. Triangle ABC has a 90 degree angle and a 40 degree angle. Triangle DEF has a 90 degree angle and a 50 degree angle. What is the measure of the third angle in DEF?
40 degrees
200
If you dilate a shape with a scale factor smaller than 1, the image gets _________.
smaller
200
Slope is a ratio that can be written as a fraction. What does the denominator represent?
the horizontal distance from one point to another on the line, the change in x
200
Does the point (50, 100) fall on the line? Show your work.
Yes
200
What is the vocabulary word used to describe a transformation that slides an object up/down and/or left/right?
Translation
300
What angle corresponds to angle LMN?
Angle SUT
300
If you dilate a 2 in. x4 in. rectangle by a scale factor of 5, the image will be a __ x ___ rectangle.
10 in. x 20 in.
300
What is the slope of the line?
2/5
300
Does the point (15, 10) fall on the line? Show your work.
Yes.
300
What are three angles that could make up a triangle?
Any three numbers that add up to 180
400
Similar figures are __________ congruent.
(always, sometimes, never)
sometimes (when the scale factor is 1)
400
The scale factor that takes Triangle LMN to Triangle STU?
1/3
400
What is the slope of the line?
400
Does the point (13, 19) fall on the line? Show your work.
Yes.
400
What happens when you rotate a segment 180 degrees about a point that is not on the line?
the image is a line parallel to the original
500
Using 3 ratios prove that Triangles LMN and STU are similar.
LM/ST = MN/TU = LN/TU = 3
500
What is the scale factor that takes the smaller triangle to the larger triangle? The center of dilation is (0,0).
3
500
Draw a line on the graph side of your whiteboard with a slope of 3.
vertical change of 3 and horizontal change of 1 between two points that fall on a line
500
Does the point (16, 21) fall on the line?
No.
500
Point A is located on (4, 3). What are the coordinates of Point A after a reflection across the y-axis?
(-4, 3)