Represent and Compare Transformations in the Plane: CCSS.Math.Content.HSG-CO.A.2

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Geometry › Represent and Compare Transformations in the Plane: CCSS.Math.Content.HSG-CO.A.2

Questions 1 - 10
1

Which one of the following best describes a rotation?

Turn

Slide

Extend

Flip

None of the other answers.

Explanation

To answer this question first recall the different geometric definitions.

Translation: To move an object from its original position a certain distance without changing the object in any other way.

Transformation: Refers to any of the four changes that can be done to an object geographically. Transformations include, reflections, translations, rotations, and resizing the object.

Reflection: To flip the orientation of an object over a specific line or function.

Rotation: To rotate or turn an object either clockwise or counter clockwise around a center point.

Therefore, the English term that best represents rotation is "turn".

2

Dilation is a type of __________.

Transformation

Translation

Rotation

Reflection

None of the answers.

Explanation

To answer this question first recall the different geometric definitions.

Translation: To move an object from its original position a certain distance without changing the object in any other way.

Transformation: Refers to any of the four changes that can be done to an object geographically. Transformations include, reflections, translations, rotations, and resizing the object.

Reflection: To flip the orientation of an object over a specific line or function.

Rotation: To rotate an object either clockwise or counter clockwise around a center point.

Since dilation is when an object changes size, that means dilation is a type of transformation.

3

Which one of the following best describes a reflection?

Flip

Slide

Extend

Shrink

None of the answers

Explanation

To answer this question first recall the different geometric definitions.

Translation: To move an object from its original position a certain distance without changing the object in any other way.

Transformation: Refers to any of the four changes that can be done to an object geographically. Transformations include, reflections, translations, rotations, and resizing the object.

Reflection: To flip the orientation of an object over a specific line or function.

Rotation: To rotate an object either clockwise or counter clockwise around a center point.

Therefore, the English term that best represents reflection is "flip".

4

Which of the following describes the change in the red polygon to the black polygon?

Screen shot 2016 06 13 at 7.16.57 am

Transformation and Translation

Reflection and Translation

Translation and Rotation

Rotation

Reflection

Explanation

To answer this question first recall the different geometric definitions that correspond to the listed possible answer choices.

Translation: To move an object from its original position a certain distance without changing the object in any other way.

Transformation: Refers to any of the four changes that can be done to an object geographically. Transformations include, reflections, translations, rotations, and resizing the object.

Reflection: To flip the orientation of an object over a specific line or function.

Rotation: To rotate an object either clockwise or counter clockwise around a center point.

Now, examine the given image and choose the appropriate answer.

Screen shot 2016 06 13 at 7.16.57 am

First, it is clear to see that the black polygon is larger than the red polygon. Therefore, a transformation has occurred since the original image has been resized. Also, the black polygon is in quadrant one while the red polygon is in quadrant three, therefore a slide or translation has occurred.

Thus the correct answer is,

"Transformation and Translation"

5

Which one of the following best describes a translation?

Slide

Flip

Turn

Extend

Shrink

Explanation

To answer this question first recall the different geometric definitions.

Translation: To move an object from its original position a certain distance without changing the object in any other way.

Transformation: Refers to any of the four changes that can be done to an object geographically. Transformations include, reflections, translations, rotations, and resizing the object.

Reflection: To flip the orientation of an object over a specific line or function.

Rotation: To rotate an object either clockwise or counter clockwise around a center point.

Therefore, the English term that best represents translation is "slide".

6

A trolley car is attached to metal ground rails that go from the most southern block in a city to the most northern block of that same city. If the trolley starts at the south end and moves all the way to the northern end, what type of geometric expression does this situation define?

Both translation and transformation.

Translation

Transformation

Reflection

Rotation

Explanation

To answer this question first recall the different geometric definitions that correspond to the listed possible answer choices.

Translation: To move an object from its original position a certain distance without changing the object in any other way.

Transformation: Refers to any of the four changes that can be done to an object geographically. Transformations include, reflections, translations, rotations, and resizing the object.

Reflection: To flip the orientation of an object over a specific line or function.

Rotation: To rotate an object either clockwise or counter clockwise around a center point.

Looking at the given situation,

"A trolley car is attached to metal ground rails that go from the most southern block in a city to the most northern block of that same city. If the trolley starts at the south end and moves all the way to the northern end, what type of geometric expression does this situation define?"

it can be seen that the trolley is not changing shape, it is not rotating nor reflecting. It is however, moving a certain distance from its starting position thus the definition of a translation and a transformation.

7

State the transformation of the red rectangle to the black rectangle.

Screen shot 2016 06 10 at 12.13.23 pm

Reflection and Translation

Rotation

Translation

Translation and Rotation

None of the other answers

Explanation

To answer this question first recall the different geometric definitions that correspond to the listed possible answer choices.

Translation: To move an object from its original position a certain distance without changing the object in any other way.

Transformation: Refers to any of the four changes that can be done to an object geographically. Transformations include, reflections, translations, rotations, and resizing the object.

Reflection: To flip the orientation of an object over a specific line or function.

Rotation: To rotate an object either clockwise or counter clockwise around a center point.

Now, examine the given image and choose the appropriate answer.

Screen shot 2016 06 10 at 12.13.23 pm

Looking at the red rectangle it is seen that the coordinate points of the vertices are:

The coordinate points of the vertices for the black triangle are:

Therefore, the red rectangle is being reflected over the axis or it is being slide up four units. Thus, the correct answer is both a reflection and a translation.

8

A basketball player is able to perfectly spin a basketball on his index finger. While the basketball is spinning, what mathematical expression can be concluded about it?

The basketball is in rotation.

The basketball is in reflection.

The basketball is in translation.

The basketball is not a transformation.

None of the other answer choices are correct.

Explanation

This question is applying mathematical and more specifically, geometric definitions to describe a real life situation. Geometric definitions usually correspond to objects in the 2 dimensional plane or 3 dimensional surface. Since the basket ball is the object in question, this problem is dealing with a the 3 dimensional space.

From here, recall what is given

"A basketball player is able to perfectly spin a basketball on his index finger."

The index finger in this particular situation is acting as an axis for the basketball. Since the basketball is spinning and is maintaining its shape and size, this is considered a "rotation" in geometry.

Therefore, the correct answer is

"The basketball is in rotation"

9

Billy is flying a kite at the park. The kite starts touching the spool of string it is attached to. As Billy runs, the spool of string unravels and the kite flies feet in the air. Which geometric term describes this situation?

Translation

Reflection

Rotation

Dilation

None of the other answers

Explanation

This question is applying mathematical and more specifically, geometric definitions to describe a real life situation. Geometric definitions usually correspond to objects in the 2 dimensional plane or 3 dimensional surface. Since the basket ball is the object in question, this problem is dealing with a the 3 dimensional space.

From here, recall what is given

"Billy is flying a kite at the park. The kite starts touching the spool of string it is attached to. As Billy runs, the spool of string unravels and the kite flies 20 feet in the air."

Recall that a translation is to move an object from its original position a certain distance without changing the object in any other way. Since the kit does not change size of shape but it does move a certain distance from where it originally started, this matches a translation.

Therefore, the correct answer is

"Translation"

10

Mrs. Johnson's classroom is organized in a grid pattern. In her classroom there are rows and columns of desks resulting in a total of desks. Which of the following depicts the resulting mathematical function of the situation, given Billy sits in desk and wants to move desks to the south and desk to the east.

Assume south represents a negative directional change in the axis and east represents a positive directional change in the axis.

Explanation

To help solve this problem, look at the desks as a coordinate grid. Given that Billy currently sits in desk and assuming south represents a negative directional change in the axis and east represents a positive directional change in the axis, we can write the following transformation.

Since Billy wants to move 2 desks south or in the "down" direction then the mathematical notation would be,

Now since Billy also wants to move one desk to the east this results in the following,

From here, plug in the starting position which is and formulate the final transformation.

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