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Derive a planar net (sector ring) from the three-dimensional shape of a funnel (truncated cone)

Author: izaExecutions: 254060
TOP/Shared Formulas (Math)/Geometry

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This tool calculates the required dimensions when shaping thin materials, such as paper, into a funnel shape.
*You can enter values in either mm or cm. The result will be in the same unit.
The larger diameter
The smaller diameter
Depth
Radius of the arc from the center to the outer edge: R 
Radius of the arc from the center inward: r 
Fan angle: θ °
Width of the net: w 
Height of the net: h 
*The width and height of the unfolded diagram are approximate values based on the fan being positioned symmetrically; if the fan is tilted, it may fit into a different rectangle.

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