Dilations Review

What is the algebraic rule for the dilated image?

• ( x , y ) --> ( 3x, 3y )
• ( 3x, 3y ) --> ( x , y )
• (x , y) --> (0.3x , 0.3y)
• ( x , y ) --> ( 2x, 2y )

Tags

CCSS.HSG.CO.A.2

A triangle has vertices with coordinates (2,0), (3, -1) and (-2,-5). If the triangle is dilated by a scale factor of 3 with the origin as the center of dilation, what are the coordinates of the vertices of the image?

• (5,3), (6,2), (1,-2)
• (6,0), (9,-3), (-6,-15)
• (2/3,0), (1,-1/3), (-2/3,-5/3)
• (-1,-3), (0,-4), (-5,-8)

Tags

CCSS.8.G.A.3

Which of the following represents a Dilation?

• (x, y) → (x, 3y)
• (x, y) → (3x, 3y)
• (x, y) → (x, y - 3)
• (x, y) → (.5x, .4y)

Tags

CCSS.8.G.A.3

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

• ½
• ¼
• 4
• 2

Tags

CCSS.8.G.A.3

Dilate Point B by a scale factor of 1/2

• (1.5,-4)
• (-1.5,1)
• (-1,-1.5)
• (-2,-2)

Tags

CCSS.8.G.A.3

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

• addition 
• subtraction 
• multiplication 
• division 

Tags

CCSS.8.G.A.3

If a rectangle has an area of 48 cm², what would be the area of a similar rectangle if the dimensions are doubled?

• 96 cm²
• 192 cm²
• 216 cm²
• 2304 cm²

Tags

CCSS.7.G.A.1

If a rectangle is drawn and another rectangle is drawn so that the sides are four times as big as the first rectangle, what happens to the area?

• doubles
• becomes half the size
• quadruples (multiplied by 4)
• becomes 1/4 the size

Tags

CCSS.7.G.A.1

Suppose the dimensions of a pentagon with an area of 12 are tripled Find the area of the new pentagon in square inches.

• 108
• 36
• 72
• 144

Tags

CCSS.7.G.A.1

Triangle ABC is dilated using the algebraic rule (x, y) --> (0.75x, 0.75y). Is triangle A'B'C' an enlargement or reduction of the original triangle?

• Enlargement because the scale factor is less than one. 
• Reduction because the scale factor is less than one. 
• Neither
• Cannot Be Determined

Tags

CCSS.8.G.A.3