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 #111 : Geometric Measurement: Recognizing Perimeter

What is the perimeter of the triangle below? 

Screen shot 2015 11 09 at 9.55.16 am

 

Possible Answers:

\(\displaystyle 96cm\)

\(\displaystyle 92cm\)

\(\displaystyle 94cm\)

\(\displaystyle 93cm\)

\(\displaystyle 95cm\)

Correct answer:

\(\displaystyle 95cm\)

Explanation:

To find the perimeter of a triangle, we add all of the side lengths together. 

\(\displaystyle 33+33+29=95\)

Example Question #112 : Geometric Measurement: Recognizing Perimeter

What is the perimeter of the triangle below? 

Screen shot 2015 11 09 at 9.48.45 am

 

Possible Answers:

\(\displaystyle 36cm\)

\(\displaystyle 39cm\)

\(\displaystyle 35cm\)

\(\displaystyle 38cm\)

\(\displaystyle 37cm\)

Correct answer:

\(\displaystyle 36cm\)

Explanation:

To find the perimeter of a triangle, we add all of the side lengths together. 

\(\displaystyle 12+9+15=36\)

Example Question #113 : Geometric Measurement: Recognizing Perimeter

What is the perimeter of the triangle below? 

Screen shot 2015 11 09 at 9.54.36 am

 

Possible Answers:

\(\displaystyle 53cm\)

\(\displaystyle 55cm\)

\(\displaystyle 56cm\)

\(\displaystyle 52cm\)

\(\displaystyle 54cm\)

Correct answer:

\(\displaystyle 54cm\)

Explanation:

To find the perimeter of a triangle, we add all of the side lengths together. 

\(\displaystyle 19+19+16=54\)

Example Question #114 : Geometric Measurement: Recognizing Perimeter

What is the perimeter of the triangle below? 

Screen shot 2015 11 09 at 9.45.18 am

 

Possible Answers:

\(\displaystyle 33cm\)

\(\displaystyle 32cm\)

\(\displaystyle 30cm\)

\(\displaystyle 31cm\)

\(\displaystyle 34cm\)

Correct answer:

\(\displaystyle 30cm\)

Explanation:

To find the perimeter of a triangle, we add all of the side lengths together. 

\(\displaystyle 5+12+13=30\)

Example Question #115 : Geometric Measurement: Recognizing Perimeter

What is the perimeter of the triangle below? 

Screen shot 2015 11 09 at 9.54.16 am

 

Possible Answers:

\(\displaystyle 66cm\)

\(\displaystyle 65cm\)

\(\displaystyle 64cm\)

\(\displaystyle 68cm\)

\(\displaystyle 67cm\)

Correct answer:

\(\displaystyle 68cm\)

Explanation:

To find the perimeter of a triangle, we add all of the side lengths together. 

\(\displaystyle 24+24+20=68\)

Example Question #116 : Geometric Measurement: Recognizing Perimeter

What is the perimeter of the triangle below? 

Screen shot 2015 11 09 at 9.44.19 am

 

Possible Answers:

\(\displaystyle 79cm\)

\(\displaystyle 61cm\)

\(\displaystyle 77cm\)

\(\displaystyle 78cm\)

\(\displaystyle 60cm\)

Correct answer:

\(\displaystyle 60cm\)

Explanation:

To find the perimeter of a triangle, we add all of the side lengths together. 

\(\displaystyle 24+10+26=60\)

Example Question #71 : How To Find The Perimeter Of A Figure

What is the perimeter of the triangle below? 

Screen shot 2015 11 09 at 9.54.00 am

 

Possible Answers:

\(\displaystyle 81cm\)

\(\displaystyle 80cm\)

\(\displaystyle 78cm\)

\(\displaystyle 79cm\)

\(\displaystyle 77cm\)

Correct answer:

\(\displaystyle 78cm\)

Explanation:

To find the perimeter of a triangle, we add all of the side lengths together. 

\(\displaystyle 27+27+24=78\)

Example Question #121 : Geometry

What is the perimeter of the triangle below? 

Screen shot 2015 11 09 at 9.43.08 am

 

Possible Answers:

\(\displaystyle 24cm\)

\(\displaystyle 22cm\)

\(\displaystyle 23cm\)

\(\displaystyle 26cm\)

\(\displaystyle 25cm\)

Correct answer:

\(\displaystyle 24cm\)

Explanation:

To find the perimeter of a triangle, we add all of the side lengths together. 

\(\displaystyle 8+10+6=24\)

Example Question #321 : Problem Solving

What is the perimeter of the triangle below? 

Screen shot 2015 11 09 at 9.53.40 am

 

Possible Answers:

\(\displaystyle 14cm\)

\(\displaystyle 15cm\)

\(\displaystyle 18cm\)

\(\displaystyle 17cm\)

\(\displaystyle 16cm\)

Correct answer:

\(\displaystyle 14cm\)

Explanation:

To find the perimeter of a triangle, we add all of the side lengths together. 

\(\displaystyle 5+5+4=14\)

Example Question #71 : How To Find The Perimeter Of A Figure

What is the perimeter of the triangle below? 

Screen shot 2015 11 09 at 10.07.02 am

 

Possible Answers:

\(\displaystyle 54cm\)

\(\displaystyle 51cm\)

\(\displaystyle 55cm\)

\(\displaystyle 53cm\)

\(\displaystyle 52cm\)

Correct answer:

\(\displaystyle 55cm\)

Explanation:

To find the perimeter of a triangle, we add all of the side lengths together. 

\(\displaystyle 19+19+17=55\)

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