ABC Triangle Calculator
Result
ABC Triangle Calculator This ABC triangle calculator works out the perimeter and area of a triangle from its three side lengths a, b, and c. The perimeter is simply a + b + c, and the area comes from Heron's formula, A = √[s(s − a)(s − b)(s − c)], where s — free online calculator.
Formula
- ABC Triangle Calculator calculates its result from Side A, Side B, Side C. It uses the formula Perimeter = a + b + c | Area = √[s(s-a)(s-b)(s-c)]. Change any input to recalculate the result instantly.
- The main inputs are Side A, Side B, Side C. Enter them in the units and format shown in the calculator.
- Keep comparable quantities in compatible units whenever the formula combines or compares them.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: ABC Triangle
- Side A: 3
- Side B: 4
- Side C: 5
For sides 3, 4, 5: perimeter = 12, semi-perimeter = 6, Heron area = 6 square units.
Sample result: Calculating…
Frequently asked questions
What does the ABC Triangle calculate?
ABC Triangle Calculator This ABC triangle calculator works out the perimeter and area of a triangle from its three side lengths a, b, and c. The perimeter is simply a + b + c, and the area comes from Heron's formula, A = √[s(s − a)(s − b)(s − c)], where s — free online calculator.
Which values should I enter?
Enter Side A, Side B, Side C using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Perimeter = a+b+c; s=(a+b+c)/2; area=√[s(s−a)(s−b)(s−c)]. Side lengths must form a triangle..
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.