圆面积计算器 — 公式
How to Calculate the Area of a Circle
Formula
A = π × r²
Where:
The area is the space enclosed within the circle.
计算示例
Find the area of a circle with radius 5.
- A = π × 5²
- = π × 25
- = 3.14159 × 25
- ≈ 78.5398
A = π × r²
Where:
The area is the space enclosed within the circle.
Find the area of a circle with radius 5.