Common Core: 1st Grade Math : Reason with Shapes and their Attributes

Study concepts, example questions & explanations for Common Core: 1st Grade Math

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Example Questions

Example Question #21 : Geometry

If I add another side to the shape below, would that change the name of the shape? 

4

Possible Answers:

Yes

No

Correct answer:

Yes

Explanation:

If I added another side to the pentagon, I would no longer have a five-sided shape, I would have a six-sided shape. By definition, a pentagon has five sides, so if I added another side I would no longer have a pentagon. The number of sides a shape has is an example of a defining attribute, which means it does determine whether or not a shape is a certain shape. 

Example Question #21 : Geometry

If I add another side to the shape below, would that change the name of the shape? 


5

Possible Answers:

Yes

No

Correct answer:

Yes

Explanation:

If I added another side to the hexagon, I would no longer have a six-sided shape, I would have a seven-sided shape. By definition, a hexagon has six sides, so if I added another side I would no longer have a hexagon. The number of sides a shape has is an example of a defining attribute, which means it does determine whether or not a shape is a certain shape. 

Example Question #22 : Defining Versus Non Defining Attributes: Ccss.Math.Content.1.G.A.1

If I change the color of the pentagon, does that change the type of shape that I have? 


4

Possible Answers:

No

Yes

Correct answer:

No

Explanation:

Changing the color of a shape does not change the type of shape. Color is considered a non-defining attribute, which means no matter what color a pentagon is, it's still a pentagon.

Example Question #21 : Defining Versus Non Defining Attributes: Ccss.Math.Content.1.G.A.1

If I change the color of the rectangle, does that change the type of shape that I have? 


3

Possible Answers:

Yes

No

Correct answer:

No

Explanation:

Changing the color of a shape does not change the type of shape. Color is considered a non-defining attribute, which means no matter what color a rectangle is, it's still a rectangle.

Example Question #21 : Reason With Shapes And Their Attributes

If I cut this rectangle in half, how many pieces will I have?

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Possible Answers:

Correct answer:

Explanation:

When we cut something in half, we get  equal pieces. 

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Example Question #22 : Reason With Shapes And Their Attributes

If I cut this circle in half, how many pieces will I have? 

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Possible Answers:

Correct answer:

Explanation:

When we cut something in half, we get two equal pieces. 

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Example Question #23 : Reason With Shapes And Their Attributes

If I cut this rectangle into fourths, or quarters, how many pieces will I have?

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Possible Answers:

Correct answer:

Explanation:

When we cut something into fourths, or quarters, we get four equal pieces.

Screen shot 2015 07 21 at 3.50.38 pm

Example Question #24 : Reason With Shapes And Their Attributes

If I cut this circle into fourths, or quarters, how many pieces will I have?

 

Screen shot 2015 07 21 at 3.51.57 pm

Possible Answers:

Correct answer:

Explanation:

When we cut something into fourths, or quarters, we get four equal pieces.

Screen shot 2015 07 21 at 3.52.58 pm

Example Question #25 : Reason With Shapes And Their Attributes

If I cut a rectangle into fourths, how am I changing the size?

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Possible Answers:

The four pieces will be the same size as the rectangle

The four pieces will be different sizes

 The four pieces will be bigger than the rectangle

The four pieces will be smaller than the rectangle
    

Correct answer:

The four pieces will be smaller than the rectangle
    

Explanation:

When we cut something in fourths, we get four smaller pieces that equal each other. If we put those pieces back together, we’d get the original size of the rectangle. 

Example Question #26 : Reason With Shapes And Their Attributes

If I cut a rectangle in half, how am I changing the size? 

Screen shot 2015 07 21 at 3.42.11 pm

Possible Answers:

Each piece will be different sizes

Each piece will be the same size as the rectangle

Each piece will be bigger than the rectangle

Each pieces will be smaller than the rectangle, they will be half the size. 
    

Correct answer:

Each pieces will be smaller than the rectangle, they will be half the size. 
    

Explanation:

When we cut something in half, we get two smaller pieces that equal each other. If we put those pieces back together, we’d get the original size of the rectangle.

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