Dilations and Similarity Quiz

What is a dilation in geometry?

• A dilation in geometry is a transformation that changes the shape of a figure without changing its size.

• A dilation in geometry is a transformation that changes the size of a figure without changing its shape.

• A dilation in geometry is a transformation that rotates a figure without changing its size.

• A dilation in geometry is a transformation that reflects a figure without changing its size.

Tags

CCSS.8.G.A.3

What are the properties of dilations?

• Dilations change the shape of a figure without changing its size.

• Dilations only change the size of a figure in one direction.

• Dilations only change the size of a figure in two dimensions.

• Dilations change the size of a figure without changing its shape.

Tags

CCSS.8.G.A.3

If two figures are similar, what can you say about their corresponding angles?

• Corresponding angles are supplementary.

• Corresponding angles are congruent.

• Corresponding angles are parallel.

• Corresponding angles are equal.

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

If two figures are similar, what can you say about their corresponding side lengths?

• Different.

• Proportional

• Equal.

• Irrelevant.

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

If a figure is dilated by a scale factor of 3, what happens to its side lengths?

• They are divided by 3.

• They are multiplied by 3.

• They are added by 3.

• They are subtracted by 3.

Tags

CCSS.8.G.A.3

If a figure is dilated by a scale factor of 0.2, what happens to its angles?

• The angles become right angles.

• The angles remain the same.

• The angles increase by 0.2.

• The angles decrease by 0.2.

Tags

CCSS.8.G.A.3

What happens to a figure when it is dilated by a scale factor of a fraction less than 1?

• it becomes smaller
• it becomes larger
• it stays the same

Tags

CCSS.8.G.A.3

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

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

Similar figures have the same ______ but different ______. 

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

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6