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Terms & Definitions
Scale Factor
New image
Proportional or not?
Shapes review
100

Changing the size of an object without changing its shape

Dilation

100
Preimage: (2, 2) Image: (5, 5)
What is 2.5?
100
Preimage: (7, 2) Scale factor: 10
What is (70, 20)
100
Preimage: (7, 8) Image: (56, 63)
No
100

Parallel sides, all sides are equal, all angles 90 degrees. 

Square
200

Dilation that creates a larger image

Enlargement

200
Preimage: (7, 8) Image: (56, 64)
What is 8?
200
Preimage: (3, 8) Scale factor: 5
What is (15, 40)
200
Preimage: (1, 10) Image: (10, 1)
no
200

Parallel sides, all sides are not equal, all angles 90 degrees

Rectangle

300

Dilation that creates a smaller image

Reduction

300
Preimage: (6, 3) Image: (2, 1)
What is 1/2?
300
Preimage: (27, 37) Scale factor: 2
What is (54, 74)
300
Preimage: (42, 49) Image: (6, 7)
Yes
300

Parallel sides, all equal sides, no right angles

Rhombus

400

The ratio of one length of a figure to another

Scale Factor

400
Preimage: (46, 37) Image: (23, 18.5)
What is 1/2?
400
Preimage: (28, 83) Scale factor: 5
What is (140, 415)
400
Preimage: (48, 336) Image: (1, 7)
yes
400

One pair of parallel sides, no equal sides, sometimes right angle

Trapezoid

500

An equation where two ratios are set equal to each other

Proportion

500
Preimage: (53.7, 35.8) Image: (161.1, 107.4)
What is 3?
500
Preimage: (222, 17) Scale factor: 34
What is (7548, 578)
500
Preimage: (247, 583) Image: (1799, 4081)
Yes
500

Parallel sides, sometimes equal sides, sometimes right angles

Parallelogram