Area of Circle

📊 beginner

$$A = \pi r^2$$

Area formula

Variables & Units

$A$

Area

Unit: $m^2$

$r$

Radius

Unit: $m$

Key Information

📐 Derived From

Integration

💡 Example

$r=2$, $$A=4\pi$$

🔧 Applications

Geometry

⚠️ Constraints

$r>0$

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