Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Geometry
Triangle Area Calculator
Calculate a triangle's area using base-height, Heron's formula (three sides), or the two-sides-and-included-angle method. Handy for geometry, surveying, and any problem where you know different combinations of triangle measurements.
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 | 5 | 1 |
| Result | Triangle Area (square units) | Circle Area (square units) |
| What it does | Calculate a triangle's area using base-height, Heron's formula (three sides), or the two-sides-and-included-angle method. Handy for geometry, surveying, and any problem where you know different combinations of triangle measurements. | 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. |