Triangle Calculator
Calculate triangle perimeter and area from three sides.
Perimeter
12
Area
6
Status
Valid triangle
Formula
Uses Heron formula when sides form a valid triangle.
Calculate triangle perimeter and area from three sides.
How to Use
Calculate triangle perimeter and area from three sides. Enter the Side A, Side B, and Side C values and review the Perimeter, Area, and Status outputs after you calculate.
- Open the calculator : Start with Triangle Calculator.
- Enter values : Fill in the required inputs and any optional settings.
- Review the result : Read the output and use the about page for more detail if needed.
Common Questions
What formula does the Triangle Calculator use?
Uses Heron formula when sides form a valid triangle.