calculatorContent.geometry.circleArea.theory.exampleUsingRadius
\(A = \pi r^2\) where \(\pi \approx 3.14159\)
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calculatorContent.geometry.circleArea.theory.sectionTitle
The area of a circle is the space enclosed by its circumference.
calculatorContent.geometry.circleArea.theory.keyPoints
- calculatorContent.geometry.circleArea.theory.point1
- calculatorContent.geometry.circleArea.theory.point2
- calculatorContent.geometry.circleArea.theory.point3
- calculatorContent.geometry.circleArea.theory.point4
\(A = \pi r^2\)
Worked Examples
calculatorContent.geometry.circleArea.theory.exampleUsingDiameter
\(A = \pi (\frac{d}{2})^2 = \frac{\pi d^2}{4}\)
calculatorContent.geometry.circleArea.theory.exampleRadius5
\(A = \pi \times 5^2 = 25\pi \approx 78.54\) square units
calculatorContent.geometry.circleArea.theory.exampleDiameter10
\(r = 5, A = \pi \times 5^2 \approx 78.54\) square units