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📐 Geometry

Perimeter of Triangle

Perimeter = sum of all sides

Formula

P = a + b + c

Perimeter = sum of all sides

Example

  • a = 5
  • b = 7
  • c = 8
  • P = 20
Result 20
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Grade 7 · Perimeter of Triangle

Easy 20 questions Worksheet #89840 For Perimeter of Triangle

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MathDigits Worksheet

Grade 7 · Perimeter of Triangle

Easy · 20 questions · Worksheet #89840 · Perimeter of Triangle

Name: ________________________

Date: ______________ Score: ______

  1. fill Find the perimeter of a triangle with sides 39 cm, 115 cm, and 67 cm. (P = a + b + c)
    ______________________________
  2. fill Find the perimeter of a triangle with sides 77 cm, 21 cm, and 24 cm. (P = a + b + c)
    ______________________________
  3. fill Find the perimeter of a triangle with sides 15 cm, 6 cm, and 50 cm. (P = a + b + c)
    ______________________________
  4. fill Find the perimeter of a triangle with sides 68 cm, 75 cm, and 55 cm. (P = a + b + c)
    ______________________________
  5. fill Find the perimeter of a triangle with sides 97 cm, 45 cm, and 92 cm. (P = a + b + c)
    ______________________________
  6. fill Find the perimeter of a triangle with sides 61 cm, 102 cm, and 15 cm. (P = a + b + c)
    ______________________________
  7. fill Find the perimeter of a triangle with sides 78 cm, 38 cm, and 26 cm. (P = a + b + c)
    ______________________________
  8. fill Find the perimeter of a triangle with sides 120 cm, 93 cm, and 26 cm. (P = a + b + c)
    ______________________________
  9. fill Find the perimeter of a triangle with sides 74 cm, 47 cm, and 96 cm. (P = a + b + c)
    ______________________________
  10. fill Find the perimeter of a triangle with sides 81 cm, 105 cm, and 23 cm. (P = a + b + c)
    ______________________________
  11. fill Find the perimeter of a triangle with sides 62 cm, 95 cm, and 58 cm. (P = a + b + c)
    ______________________________
  12. fill Find the perimeter of a triangle with sides 91 cm, 35 cm, and 55 cm. (P = a + b + c)
    ______________________________
  13. fill Find the perimeter of a triangle with sides 55 cm, 60 cm, and 73 cm. (P = a + b + c)
    ______________________________
  14. fill Find the perimeter of a triangle with sides 111 cm, 4 cm, and 6 cm. (P = a + b + c)
    ______________________________
  15. fill Find the perimeter of a triangle with sides 34 cm, 12 cm, and 25 cm. (P = a + b + c)
    ______________________________
  16. fill Find the perimeter of a triangle with sides 79 cm, 44 cm, and 116 cm. (P = a + b + c)
    ______________________________
  17. fill Find the perimeter of a triangle with sides 111 cm, 5 cm, and 23 cm. (P = a + b + c)
    ______________________________
  18. fill Find the perimeter of a triangle with sides 11 cm, 94 cm, and 58 cm. (P = a + b + c)
    ______________________________
  19. fill Find the perimeter of a triangle with sides 68 cm, 60 cm, and 103 cm. (P = a + b + c)
    ______________________________
  20. fill Find the perimeter of a triangle with sides 96 cm, 42 cm, and 55 cm. (P = a + b + c)
    ______________________________

Updated July 2026

FAQs

What is Perimeter of Triangle?

Perimeter of Triangle (perimeter triangle) is a geometry relationship written as Perimeter = sum of all sides or P = a + b + c. Students use it to solve unknowns when enough values are known.

How do you calculate Perimeter of Triangle step by step?

Write Perimeter = sum of all sides, substitute the known numbers carefully, then simplify. Worked walkthrough: a = 5 b = 7 c = 8 P = 20.

When is Perimeter of Triangle taught in school?

Perimeter of Triangle usually appears in geometry units during middle or secondary school. Match difficulty with MathDigits grade worksheets so practice fits the curriculum year.

What is a real example of Perimeter of Triangle?

On this page the worked result is 20. Generate a formula worksheet below for more unique practice sets.

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