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Perimeter of a Regular Pentagon
P = 5a
Where: P = Perimeter, a = side
Use the same units for all lengths (e.g. all in cm); areas come out in cm², volumes in cm³.
Solved example
Given: a = 7
Find: P (Perimeter)
- Formula: P = 5·a
- Substitute the values: P = 5·7
- Result: P = 35
Answer: P = 35
Calculator
How to calculate Perimeter of a Regular Pentagon
- Write down the formula: P = 5a.
- Note the known values (a).
- Substitute them and simplify to find P.
- Use the calculator above to solve for any letter.
Frequently asked questions
What is the formula for Perimeter of a Regular Pentagon?
The formula is P = 5a, where P = Perimeter, a = side.
What is Perimeter of a Regular Pentagon when a = 7?
P = 35. Substitute the values into P = 5a and simplify.