Dilations and Rigid/Non-Rigid Transformations HW #2

1.

Multiple Choice

2 mins

1 pt

Definition: The figure before a transformation has occurred.

Pre-image

Image

Translation

Reflection

2.

Multiple Choice

2 mins

1 pt

Definition: The figure after a transformation has occurred.

Pre-image

Image

Translation

Reflection

3.

Multiple Choice

2 mins

1 pt

Definition: The figure before a transformation has occurred.

Pre-image

Image

Translation

Reflection

4.

Multiple Choice

2 mins

1 pt

A dilation always produces a congruent figure.

True

False

5.

Multiple Choice

2 mins

1 pt

A dilation is which of the following:

only an enlargement

only a reduction

either an enlargement or a reduction

neither an enlargement nor a reduction

6.

Multiple Choice

2 mins

1 pt

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

measure; shapes

sizes; shapes

value; measures

shape; sizes

7.

Multiple Choice

30 sec

1 pt

How do you write the algebraic notation when the scale factor is 3?

(x, y) goes to (1/3x, 1/3y)

(x, y) goes to (-3x, -3y)

(x, y) goes to (x + 3, y + 3)

(x, y) goes to (3x, 3y)

8.

Multiple Choice

15 mins

1 pt

When the scale factor of a dilation is less than one, the dilation is a...

Reduction

Enlargement

9.

Multiple Choice

15 mins

1 pt

If an image is dilated by a scale factor below, the dilation is a...

k\ =\ \frac{10}{3}

Reduction

Enlargement

10.

Multiple Choice

3 mins

1 pt

State the coordinate of the image of the given point B (-10,-6) under a dilation with center at the origin with the given scale factor k = 1/2.

(5,3)

(20,12)

(-20,-12)

(-5,-3)

11.

Multiple Choice

3 mins

1 pt

Dilate Point B by a scale factor of 1/2

(1.5,-4)

(-1.5,1)

(-1,-1.5)

(-2,-2)

12.

Multiple Choice

3 mins

1 pt

Dilate Point B by a scale factor of 3:

(12,0)

(12,12)

(4,3)

(0,12)

13.

Multiple Choice

30 sec

1 pt

Translations, reflections and rotations are all known as ________________________.

Geometry

Rigid Transformations

Congruent

Non- Rigid Transformations

14.

Multiple Choice

30 sec

1 pt

Which transformation is NOT a rigid motion (the size changes)?

reflection

rotation

dilation

translation

15.

Multiple Choice

30 sec

1 pt

A rigid motion ...

preserves size and location

preserves shape and location

preserves size and shape

makes the figure larger

16.

Multiple Choice

3 mins

1 pt

A type of transformation where a figure is “flipped” over a line of symmetry. A reflection produces a mirror image of a figure.

rotation

translation

dilation

reflection

17.

Multiple Choice

3 mins

1 pt

A transformation that “turns” a figure about a fixed point at a given angle and a given direction.

rotation

translation

reflection

dilation

18.

Multiple Choice

30 sec

1 pt

A slide is also called a _________.

Translation

Reflection

Rotation

Transformation

19.

Multiple Choice

30 sec

1 pt

The non-rigid transformation that changes the size of the pre-image is called:

Dilation

Rotation

Translation

Reflection

20.

Multiple Choice

3 mins

1 pt

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

½

¼

4

2

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