Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Geometry
Triangle Area Calculator
Find the area of a triangle from its three side lengths using Heron's formula. Ideal for geometry homework, land surveying, and construction layouts.
Fill in the required fields to see your result.
Geometry
Circle Area Calculator
Calculates the area enclosed by a circle from its radius using A = π·r². Ideal for geometry homework, landscaping projects, or sizing circular spaces like pools, garden beds, or pipe cross-sections.
Fill in the required fields to see your result.
Key differences
| Triangle Area Calculator | Circle Area Calculator | |
|---|---|---|
| Category | Geometry | Geometry |
| Inputs required | 3 | 1 |
| Result | Triangle Area (square units) | Circle Area (square units) |
| What it does | Find the area of a triangle from its three side lengths using Heron's formula. Ideal for geometry homework, land surveying, and construction layouts. | Calculates the area enclosed by a circle from its radius using A = π·r². Ideal for geometry homework, landscaping projects, or sizing circular spaces like pools, garden beds, or pipe cross-sections. |