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The lateral surface area of a right circular cone is = where is the radius of the circle at the bottom of the cone and is the slant height of the cone. [4] The surface area of the bottom circle of a cone is the same as for any circle, . Thus, the total surface area of a right circular cone can be expressed as each of the following:
A tholos (pl.: tholoi; from Ancient Greek θόλος, meaning "conical roof" [1] or "dome"), in Latin tholus (pl.: tholi), is a form of building that was widely used in the classical world. It is a round structure with a circular wall and a roof, usually built upon a couple of steps (a podium), and often with a ring of columns supporting a ...
In this case the cone roof was surrounded by a defensive wall, a parapet or a battlement. Such conical roofs were usually constructed using a timber-framed support structure covered with slate; more rarely they were made of masonry. A small circular turret or tourelle with a conical roof is called a pepperpot or pepperbox turret. [3]
A conic is the curve obtained as the intersection of a plane, called the cutting plane, with the surface of a double cone (a cone with two nappes).It is usually assumed that the cone is a right circular cone for the purpose of easy description, but this is not required; any double cone with some circular cross-section will suffice.
Reconstructed crannog on Loch Tay, Scotland. A roundhouse is a type of house with a circular plan, usually with a conical roof. In the later part of the 20th century, modern designs of roundhouse eco-buildings were constructed with materials such as cob, cordwood or straw bale walls and reciprocal frame green roofs.
An elliptic cone, a special case of a conical surface, shown truncated for simplicity In geometry , a conical surface is an unbounded three-dimensional surface formed from the union of infinite lines that pass through a fixed point and a space curve .
The African round hut known in literature as cone on cylinder or cone on drum hut. The hut has different names in various African languages. It is constructed usually with a conical foundation and peaked thatched roof. It is most commonly made out of mud and its roof is often made with grass and with local materials.
Boundary is a circle. All parallels and meridians are circular arcs. Usually clipped near 80°N/S. Standard world projection of the NGS in 1922–1988. c. 150: Equidistant conic = simple conic: Conic Equidistant Based on Ptolemy's 1st Projection Distances along meridians are conserved, as is distance along one or two standard parallels. [3] 1772