A frustum.
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A frustum of a cone is that part of the surface of a cone between two planes perpendicular to the axis of the cone; if a cone has base radii r1 and r2 and slant height h, then its area, A is given byA = 2*pi*h*(r1+r2)/2cited from Varberg and Purcell's Calculus textbook, 9ed.; p299.
Yes, it must because a frustum is only a part of a cone.
the 38th parallel divided the communist Northern part of Korea and the capitalist Southern part of Korea.
A cutoff operation separates parts from a strip by shearing one edge of each part in sequence. A partingoperation cuts a slug between adjacent parts in the strip.
The eye .In there eye there is rod cells and cone cells. Rod cells detect color and Cone cells detect black and white. The cone cells let you see in the dark.