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|Jock Dempsey, Dempsey's Forge|
|A flat layout showing that the ratio or percentage of the layout circle is also the sine of half the angle of the top of the cone. If you want a cone with a 90-degree point, the ratio is the sine of half the angle of the point.|
|Levels:||High School (9-12)|
|Math Topics:||Higher-Dimensional Geometry, Conic Sections and Circles|
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