Geometry A unit 3 test

State the coordinate of the image of the given point B (4,9) under a dilation with center at the origin with the given scale factor of 2.

• B' (2 , 4.5)

• B' (-8 ,-18)

• B' (8 ,18)

• B' (9 ,4)

The point (8, 12) was dilated to become point (2, 3). What was the scale factor?

• ½
• ¼
• 4
• 2

In a dilation what mathematical operation is used with the scale factor?

• addition 
• subtraction 
• multiplication 
• division 

Dilate Point B by a scale factor of 3:

• (12,0)
• (12,12)
• (4,3)
• (0,12)

A dilation always produces a similar figure. Similar figures have the same ______ but different ______. 

• measure; shapes
• sizes; shapes
• value; measures
• shape; sizes

What is the scale factor from triangle ABC to triangle DEF?

• 1/2
• 7/3
• 2/1
• 10/3

Find the triangle similar to △ABC

• 
• 
• 
• 

TGR ~ IGE, which statement must be true?

• TR = IE

• RG = TG

• $\frac{TR}{IE}=\frac{TI}{IG}$

• $\frac{TR}{IE}=\frac{TG}{IG}$

Solve the proportion.

• p=31.3
• p=308
• p=924
• p=532