Annulus Sector Calculation
Calculator and formulas for calculating an annulus sector
Various parameters of an annulus sector are calculated on this page. A circular ring sector is a section of an annulus. It is limited by two straight lines from its center.
The formulas for calculating an annulus can be found at the bottom of this page.
To perform the calculation, enter the two radii and the angle, then click the 'Calculate' button.
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Formulas for calculating annulus sectors
Area
\(\displaystyle A = π · (R^2-r^2) · \frac{α}{360}\)
Perimeter
\(\displaystyle P = π · (R+r )· \frac{α}{180}+2·(R-r)\)
Side length
\(\displaystyle s = R-r\)
Outer arc length
\(\displaystyle ba = π · R · \frac{α}{180} \)
Inner arc length
\(\displaystyle ba = π · r · \frac{α}{180} \)
Diagonal
\(\displaystyle d = \sqrt{R^2+r^2-2·R·r·cos(α)}\)
Angle functions
From Deg, Min, Sec to Decimal • From Degree to Percent • Angle sum • Side lengths from anglesCircular functions
Annulus • Annulus sector • Circle • Circular angles • Circular arcs • Circular sector • Circular segment • Ellipse • Parabolic arch • Squaring the Circle
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