Common Core: 3rd Grade Math : Geometric Measurement: Recognizing Perimeter

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

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Example Questions

Example Question #472 : Plane Geometry

What is the perimeter of the rectangle below? 

Screen shot 2015 09 29 at 8.31.53 am

Possible Answers:

\(\displaystyle 17in\)

\(\displaystyle 19in\)

\(\displaystyle 20in\)

\(\displaystyle 18in\)

\(\displaystyle 16in\)

Correct answer:

\(\displaystyle 20in\)

Explanation:

The formula for perimeter of a rectangle is \(\displaystyle P=2(l + w)\)

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

\(\displaystyle P=2(7+3)\)

\(\displaystyle P=2(10)\)

\(\displaystyle P=20\)

Example Question #1342 : Isee Lower Level (Grades 5 6) Quantitative Reasoning

What is the perimeter of the rectangle below? 

Screen shot 2015 09 29 at 8.32.51 am

Possible Answers:

\(\displaystyle 28in\)

\(\displaystyle 27in\)

\(\displaystyle 25in\)

\(\displaystyle 26in\)

\(\displaystyle 24in\)

Correct answer:

\(\displaystyle 24in\)

Explanation:

The formula for perimeter of a rectangle is \(\displaystyle P=2(l + w)\)

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

\(\displaystyle P=2(7+5)\)

\(\displaystyle P=2(12)\)

\(\displaystyle P=24\)

Example Question #473 : Plane Geometry

What is the perimeter of the rectangle below? 

Screen shot 2015 09 29 at 8.31.30 am

Possible Answers:

\(\displaystyle 23in\)

\(\displaystyle 22in\)

\(\displaystyle 25in\)

\(\displaystyle 21in\)

\(\displaystyle 24in\)

Correct answer:

\(\displaystyle 24in\)

Explanation:

The formula for perimeter of a rectangle is \(\displaystyle P=2(l + w)\)

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

\(\displaystyle P=2(11+1)\)

\(\displaystyle P=2(12)\)

\(\displaystyle P=24\)

Example Question #474 : Plane Geometry

What is the perimeter of the rectangle below? 

Screen shot 2015 09 29 at 8.29.52 am

Possible Answers:

\(\displaystyle 41in\)

\(\displaystyle 39in\)

\(\displaystyle 38in\)

\(\displaystyle 37in\)

\(\displaystyle 40in\)

Correct answer:

\(\displaystyle 38in\)

Explanation:

The formula for perimeter of a rectangle is \(\displaystyle P=2(l + w)\)

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

\(\displaystyle P=2(11+8)\)

\(\displaystyle P=2(19)\)

\(\displaystyle P=38\)

Example Question #475 : Plane Geometry

What is the perimeter of the rectangle below? 


Screen shot 2015 09 29 at 8.29.29 am

Possible Answers:

\(\displaystyle 34in\)

\(\displaystyle 31in\)

\(\displaystyle 35in\)

\(\displaystyle 36in\)

\(\displaystyle 32in\)

Correct answer:

\(\displaystyle 34in\)

Explanation:

The formula for perimeter of a rectangle is \(\displaystyle P=2(l + w)\)

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

\(\displaystyle P=2(11+6)\)

\(\displaystyle P=2(17)\)

\(\displaystyle P=34\)

Example Question #1345 : Isee Lower Level (Grades 5 6) Quantitative Reasoning

What is the perimeter of the rectangle below? 

Screen shot 2015 09 29 at 8.28.37 am

Possible Answers:

\(\displaystyle 31in\)

\(\displaystyle 30in\)

\(\displaystyle 34in\)

\(\displaystyle 33in\)

\(\displaystyle 32in\)

Correct answer:

\(\displaystyle 30in\)

Explanation:

The formula for perimeter of a rectangle is \(\displaystyle P=2(l + w)\)

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

\(\displaystyle P=2(9+6)\)

\(\displaystyle P=2(15)\)

\(\displaystyle P=30\)

Example Question #1 : Geometric Measurement: Recognizing Perimeter

What is the perimeter of the rectangle below? 


Screen shot 2015 09 29 at 8.27.30 am

Possible Answers:

\(\displaystyle 25in\)

\(\displaystyle 22in\)

\(\displaystyle 24in\)

\(\displaystyle 26in\)

\(\displaystyle 23in\)

Correct answer:

\(\displaystyle 26in\)

Explanation:

The formula for perimeter of a rectangle is \(\displaystyle P=2(l + w)\)

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

\(\displaystyle P=2(9+4)\)

\(\displaystyle P=2(13)\)

\(\displaystyle P=26\)

Example Question #1 : Find Perimeter Or Missing Side Lengths Of Polygons: Ccss.Math.Content.3.Md.D.8

What is the perimeter of the rectangle below? 


Screen shot 2015 09 29 at 8.27.11 am

Possible Answers:

\(\displaystyle 32in\)

\(\displaystyle 33in\)

\(\displaystyle 35in\)

\(\displaystyle 31in\)

\(\displaystyle 34in\)

Correct answer:

\(\displaystyle 32in\)

Explanation:

The formula for perimeter of a rectangle is \(\displaystyle P=2(l + w)\)

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

\(\displaystyle P=2(12+4)\)

\(\displaystyle P=2(16)\)

\(\displaystyle P=32\)

Example Question #2 : Geometric Measurement: Recognizing Perimeter

What is the perimeter of the rectangle below? 

Screen shot 2015 09 29 at 8.26.39 am

Possible Answers:

\(\displaystyle 39in\)

\(\displaystyle 38in\)

\(\displaystyle 41in\)

\(\displaystyle 40in\)

\(\displaystyle 36in\)

Correct answer:

\(\displaystyle 40in\)

Explanation:

The formula for perimeter of a rectangle is \(\displaystyle P=2(l + w)\)

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

\(\displaystyle P=2(12+8)\)

\(\displaystyle P=2(20)\)

\(\displaystyle P=40\)

Example Question #3 : Find Perimeter Or Missing Side Lengths Of Polygons: Ccss.Math.Content.3.Md.D.8

What is the perimeter of the rectangle below? 


Screen shot 2015 09 29 at 8.16.34 am

Possible Answers:

\(\displaystyle 35in\)

\(\displaystyle 38in\)

\(\displaystyle 36in\)

\(\displaystyle 37in\)

\(\displaystyle 34in\)

Correct answer:

\(\displaystyle 36in\)

Explanation:

The formula for perimeter of a rectangle is \(\displaystyle P=2(l + w)\)

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

\(\displaystyle P=2(10+8)\)

\(\displaystyle P=2(18)\)

\(\displaystyle P=36\)

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