Maths — Circle Measures
Area, circumference, arc length and sector area.
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A = \pi r^2
C = 2\pi r
\text{arc} = r\theta
\text{sector} = \tfrac{1}{2}r^2\theta
Area, circumference, arc length and sector area.
A = \pi r^2
C = 2\pi r
\text{arc} = r\theta
\text{sector} = \tfrac{1}{2}r^2\theta