Performing transformations

Dilation

• A change that alters shape, but not size

• A change that alters size, but not shape

• The spinning of a shape around a central point.

Triangle QRS is dilated with the origin as the center of dilation to create triangle Q'R'S'. The coordinates of each vertex are integers.

Which statement is true?

• Triangle Q'R'S' is congruent to triangle QRS.

• Triangle Q'R'S' is similar to triangle QRS.

Tags

8.3.B

Which of the following scale factors could have possibly created the dilation shown?

• 
• 
• 
• 

Dilate Point B by a scale factor of 3:

• (12,0)
• (12,12)
• (4,3)
• (0,12)

True of False: When you shrink a figure, you multiply by a fraction. 

• true
• false

A  figure has a vertices W(-2,4), and X(1,4. Find the  coordinates of the figure after a dilation with a scale factor of 2.

• W(-4,83),  X(2,8)
• W(-4,8), X(2,8)

The number multiplied by x and y to result in a dilation is called the ______.

• Scale Factor
• Exponent
• Coefficient
• Variable

In this dilation, point A would be considered...

• the center of dilation

• the scale factor

• the center of rotation

• the point of no return

A scale factor greater than one creates ....

• a reduction
• an enlargement
• an exact copy
• none of these

A triangle has the points A(9, 18), B(12, 3) and C(6, 9). The triangle is being dilated by a scale factor of 1/3. What are the coordinates of B'?

• (36, 9)

• (4, 1)

• (3, 3)