Curved Surface Area of Cones

See how the curved surface of the cone can be flattened to a sector, which then be dissected and rearranged to see that its area is π r l, where r and l are the base radius and the slant height of the cone respectively. This applet combines the previous 3D applet ([url]206987[/url] or [url]166737[/url]) and its 2D counterpart ([url]161406[/url]) in a single applet. Anthony C.M. Or GeoGebra Institute of Hong Kong


C.J. Carlson

Resource Type
area  cone  surface 
Target Group (Age)
14 – 18
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