Triangle perimeter
Solve triangle perimeter with your values and follow each calculation step.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
P = a+b+c
Variables & units
- First side
- cm · minimum 0, maximum 1000000
- Second side
- cm · minimum 0, maximum 1000000
- Third side
- cm · minimum 0, maximum 1000000
Worked example
Sides 3,4,5 cm give a perimeter of 12 cm.
Assumptions
Three arbitrary lengths do not always form a triangle.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
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