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Details for problem "Triangle sides and perimeter"

Quickname: 7677

Suitable for K-12 grades: Grade 7 Grade 8

Junior High School, Middle School, High School.


For a given triangle, the sides and/or perimeter have to be determined.


For a given triangle, the sides and/or perimeter have to be determined. (Example for this math problem)


Use this problem in your worksheets to calculate the perimeter or any of the missing side in a triangle when all other values are given. For a triangle, the perimeter is found by adding the lengths of the three sides. In this problem set, one of these values (side a, side b, side c, perimeter) is missing, the other three are given. The missing value has to be calculated from the other ones. This kind of worksheet can be used as a small or whole group activity or independent/ homework practice for mastery of finding the perimeter of a triangle using sides. Practice this problem in variation to boost the objectives given below.

  1. Recall the addition of decimal numbers.
  2. The formula to find the perimeter of a triangle is revised.
  3. Understand the use of measurement units.
  4. Buildup concept of deriving required value from a given equation.
  5. Develop algebraic skills in geometry.

The complexity level can be personalized to use these worksheets from grade 7 and grade 8.

The answer key will include the solution of missing value.

Topics: Geometry

Tags: Triangle

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Customization options for this problem

Possible values
Number of problems
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Ask for
sides, perimeter, sides, perimeter

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