แผ่นงานDilations on the Coordinate Plane (Handout & Homework)
คำถามทั้งหมด: 15
To dilate a figure on the coordinate plane, multiply the x and y values of the each ordered pair by the given (a)
If the scale factor is (a) than one, it will enlarge a figure.
If the scale factor is (a) than one, it will reduce a figure.
When a dilation has occurred on the coordinate plane, you can find the scale factor by choosing corresponding sides or vertices and setting up a ratio: (a)
pre−imageimage
Dilate triangle ABC using a scale factor of 1.5. Use the graph to answer the following questions.
1. Record the pre-image coordinates
A (-2,-2)
B (2, 2)
C (4, -2)
A (2, -2)
B (-2, 2)
C (-4, -2)
A (-2, -2)
B (2, 2)
C (-2, 4)
Dilate triangle ABC using a scale factor of 1.5. Use the graph to answer the following questions.
1. Record the image coordinates
A' (-3, -4)
B' (3, 5)
C'(-3, 6)
A' (-3, -3)
B' (3, 3)
C' (6,-3)
A (-2, -2)
B (2, 2)
C (-2, 4)
Graph the image.
The triangle dilated by a scale factor of 1.5
Write a rule to represent the dilation.
(x, y)→(1.5x, 1.5y)
(x, y)→(32x, 32y)
(x, y)→(3x, 3y)
(x, y)→(2x,2y)
Find the scale factor that was used in the dilation and write the rule to represent the dilation.
Scale Factor: 3
Rule: (x, y)→(3x, 3y)
Scale Factor: 31
Rule: (x, y)→(31x, 31y)
Scale Factor: 2
Rule: (x, y)→(2x, 2y)
Scale Factor: 21
Rule: (x, y)→(21x, 21y)
Find the scale factor that was used in the dilation and write the rule to represent the dilation.
Scale Factor: 3
Rule: (x, y)→(3x, 3y)
Scale Factor: 31
Rule: (x, y)→(31x, 31y)
Scale Factor: 2
Rule: (x, y)→(2x, 2y)
Scale Factor: 21
Rule: (x, y)→(21x, 21y)
Find the scale factor that was used in the dilation and write the rule to represent the dilation.
Scale Factor: 3
Rule: (x, y)→(3x, 3y)
Scale Factor: 31
Rule: (x, y)→(31x, 31y)
Scale Factor: 2
Rule: (x, y)→(2x, 2y)
Scale Factor: 21
Rule: (x, y)→(21x, 21y)
Which of the following is NOT a true statement about the dilation shown at the right?
The dilation represents an enlargement.
Th ratio of HIH′I′=IJI′J′
The dilation can be represented by (x, y)→(2x, 2y)
The dilation changed the orientation of the figure.
Dilate the rectangle ABCD shown below using the rule (x, y)→(0.8x, 0.8y) .
Determine whether the statement is true or false.
A'B'C'D' will be smaller than ABCD.
True
False
Dilate the rectangle ABCD shown below using the rule (x, y)→(0.8x, 0.8y) .
Determine whether the statement is true or false.
A' will be located at (8, 4).
True
False
Dilate the rectangle ABCD shown below using the rule (x, y)→(0.8x, 0.8y) .
Determine whether the statement is true or false.
The length of segment A'B' will be 5.8 units.
True
False
แป้นคำตอบDilations on the Coordinate Plane (Handout & Homework)
คำถามทั้งหมด: 15
pre−imageimage
A (-2,-2)
B (2, 2)
C (4, -2)
A' (-3, -3)
B' (3, 3)
C' (6,-3)
(x, y)→(1.5x, 1.5y)
Scale Factor: 31
Rule: (x, y)→(31x, 31y)
Scale Factor: 3
Rule: (x, y)→(3x, 3y)
Scale Factor: 2
Rule: (x, y)→(2x, 2y)
The dilation changed the orientation of the figure.
True
False
False
