Common Core: 3rd Grade Math : Find Perimeter or Missing Side Lengths of Polygons: CCSS.Math.Content.3.MD.D.8

Study concepts, example questions & explanations for Common Core: 3rd Grade Math

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Example Questions

Example Question #621 : Geometry

What is the width of the rectangle if the perimeter is  and the length is ?

Possible Answers:

Correct answer:

Explanation:

The formula for perimeter of a rectangle is 

To solve for the width we can plug our known values into the equation. 

Subtract  from both sides

Divide  by both sides

Example Question #622 : Geometry

What is the width of the rectangle if the perimeter is  and the length is ?

 

Possible Answers:

Correct answer:

Explanation:

The formula for perimeter of a rectangle is 

To solve for the width we can plug our known values into the equation. 

Subtract  from both sides

Divide  by both sides

Example Question #582 : Geometry

What is the width of the rectangle if the perimeter is  and the length is ?

Possible Answers:

Correct answer:

Explanation:

The formula for perimeter of a rectangle is 

To solve for the width we can plug our known values into the equation. 

Subtract  from both sides

Divide  by both sides

Example Question #31 : Geometric Measurement: Recognizing Perimeter

What is the width of the rectangle if the perimeter is  and the length is ?

 

Possible Answers:

Correct answer:

Explanation:

The formula for perimeter of a rectangle is 

To solve for the width we can plug our known values into the equation. 

Subtract  from both sides

Divide  by both sides

Example Question #624 : Geometry

What is the width of the rectangle if the perimeter is  and the length is ?

 

Possible Answers:

Correct answer:

Explanation:

The formula for perimeter of a rectangle is 

To solve for the width we can plug our known values into the equation. 

Subtract  from both sides

Divide  by both sides

Example Question #32 : Geometric Measurement: Recognizing Perimeter

What is the width of the rectangle if the perimeter is  and the length is ?

 

Possible Answers:

Correct answer:

Explanation:

The formula for perimeter of a rectangle is 

To solve for the width we can plug our known values into the equation. 

Subtract  from both sides

Divide  by both sides

Example Question #157 : Plane Geometry

What is the perimeter of the square below? 

Screen shot 2015 11 05 at 8.19.52 am

Possible Answers:

Correct answer:

Explanation:

To solve this problem, we need to remember is that a square has four sides of equal length. This means that given one side length, we know all the other side lengths. The formula for perimeter is , which is the same thing as adding all the side lengths together. 

 or 

Example Question #171 : Geometry

What is the perimeter of the square below? 


Screen shot 2015 11 05 at 8.21.29 am

Possible Answers:

Correct answer:

Explanation:

To solve this problem, we need to remember is that a square has four sides of equal length. This means that given one side length, we know all the other side lengths. The formula for perimeter is , which is the same thing as adding all the side lengths together. 

 or 

Example Question #31 : Geometric Measurement: Recognizing Perimeter

What is the perimeter of the square below? 


Screen shot 2015 11 05 at 8.23.29 am

Possible Answers:

Correct answer:

Explanation:

To solve this problem, we need to remember is that a square has four sides of equal length. This means that given one side length, we know all the other side lengths. The formula for perimeter is , which is the same thing as adding all the side lengths together. 

 or 

Example Question #160 : Plane Geometry

What is the perimeter of the square below? 

Screen shot 2015 11 05 at 8.26.37 am

Possible Answers:

Correct answer:

Explanation:

To solve this problem, we need to remember is that a square has four sides of equal length. This means that given one side length, we know all the other side lengths. The formula for perimeter is , which is the same thing as adding all the side lengths together. 

 or 

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