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Perimeter (arc + diameter) of a Semicircle
P = πr + 2r = r(π + 2)
Where: P = Perimeter (arc + diameter), r = radius
Use the same units for all lengths (e.g. all in cm); areas come out in cm², volumes in cm³.
Solved example
Given: r = 7
Find: P (Perimeter (arc + diameter))
- Formula: P = 2·r + π·r
- Substitute the values: P = 2·7 + π·7
- Result: P = 35.991149
Answer: P = 35.991149
Calculator
How to calculate Perimeter (arc + diameter) of a Semicircle
- Write down the formula: P = πr + 2r = r(π + 2).
- Note the known values (r).
- 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 (arc + diameter) of a Semicircle?
The formula is P = πr + 2r = r(π + 2), where P = Perimeter (arc + diameter), r = radius.
What is Perimeter (arc + diameter) of a Semicircle when r = 7?
P = 35.991149. Substitute the values into P = πr + 2r = r(π + 2) and simplify.