The essentials of descriptive geometry . and acone with an elliptical base may be either elliptical or circularin section according to the angle of inclination. A right cone is one whose axis is perpendicular to the planeof the base. Right cones may be either circular or elliptical insection and are named accordingly, as: a right circular cone, ora right elliptical cone. 100. To assume a point on the surface of the cone eitherprojection of a point may be assumed on the corresponding pro- ii6 ESSENTIALS OF DESCRIPTIVE GEOMETRY jection of some element and the other projection of the pointfound b
The essentials of descriptive geometry . and acone with an elliptical base may be either elliptical or circularin section according to the angle of inclination. A right cone is one whose axis is perpendicular to the planeof the base. Right cones may be either circular or elliptical insection and are named accordingly, as: a right circular cone, ora right elliptical cone. 100. To assume a point on the surface of the cone eitherprojection of a point may be assumed on the corresponding pro- ii6 ESSENTIALS OF DESCRIPTIVE GEOMETRY jection of some element and the other projection of the pointfound by locating it on the other projection of the same , in Fig. 92, the projection y is assumed on the projectionof the element qr and the projection y then will be found on will be noted, as in the case of cylinders, that there are twoelements of the cone whose elevations coincide with this line, onebeing QR and the other QP, so that it is possible to have twopoints on the cone whose elevations coincide at x, one being Y.
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Keywords: ., bookcentury1900, bookdecade1910, bookidcu3192400462, bookyear1915
