 | James Gow - 380 pàgines
...excellent mathematician of the first century BC, the following remarks' : " The ancients, denning a cone as the revolution of a rightangled triangle about one of the sides containing the right angle, naturally supposed also that all cones are right and there is only one kind of section in each —... | |
 | John William Mercer - 466 pàgines
...cylinder is generated by the rotation of a rectangle about one side. A cone is generated by the rotation of a right-angled triangle about one of the sides containing the right angle. A sphere is generated by the rotation of a semi-circle about the diameter. 186. To find the volume... | |
 | 288 pàgines
...right cone. The right cone is the solid figure of revolution generated or swept out by the rotation of a right-angled triangle about one of the sides containing the right angle. The base of the cone is a circle. Just as we regarded the cylinder as a prism the base of which has... | |
 | 176 pàgines
...is equal to the perimeter of base of cone. 188. A right circular cone can be swept out by rotating a rightangled triangle about one of the sides containing the right angle. 189. Let C be the centre of ring, O the point of suspension, and A, B two consecutive points of attachment... | |
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A cone is a solid figure described by the revolution of a rightangled triangle about one of the sides containing the right angle, which side remains fixed. 
