Circle formulae
Area = π × r²; circumference = 2 × π × r. If you have diameter, use r = diameter/2.
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Daire Alan ve Çevre
Yarıçaptan alan ve çevre.
Last updated: 2026-08-12
Sources
- CSGB / Asgari Ücret Tespit Komisyonu (2026 brüt/net)
- GİB gelir vergisi tarifesi 2026
- EPDK mesken elektrik kademeli tarife (yaklaşık)
- BOTAŞ / dağıtım şirketleri doğalgaz (yaklaşık)
- Hazine ve Maliye — kıdem tazminatı tavanı 1. dönem 2026
How is it calculated?
A=πr², Ç=2πr
A=πr²
Example
r=4 örneği.
Guide
Circle area (πr²) and circumference (2πr) from radius. For discs, pools, or sections. Informational only.
2026 notes and common mistakes
Entering diameter as radius doubles errors on length and quadruples area mistakes.
Tips
- Confirm radius versus diameter input.
- For information only—add tolerances for fabrication.
Sources: Basic geometry · Math references
FAQ
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Official result? +
Informational only; verify official sources.