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" CD equal to the subtangent cD (Fig. 1), and joining the points c and D (Fig. 2). It is now required to develop the cone, and trace on the development the curve of intersection with the horizontal plane of projection. Let the cone be developed on the tangent... "
Elements of Descriptive Geometry: With Their Application to Spherical ... - Page 95
by Charles Davies - 1835 - 174 pages
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Elements of Descriptive Geometry: With Their Application to Spherical ...

Charles Davies - Geometry, Descriptive - 1840 - 260 pages
...centre of the circle, in which it intersects the surface of the cylinder, falls at H" : with this point as a centre, and a radius equal to the radius of the base of the cylinder, describe the circle ENFN'. But IN is the revolved position of the perpendicular...
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Elements of Descriptive Geometry: With Their Application to Spherical ...

Charles Davies - Geometry, Descriptive - 1868 - 258 pages
...distances of the corresponding points in (Fig. 1) above the horizontal plane ; the curve Ihg, &c., tc I, traced through these points, is the curve of intersection...element of the cone that passes through the point (b,b') (Fig. 1). By making, in like manner, ba equal to ba (Fig. 2), an equal to an, &c., and laying...
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Descriptive Geometry

Linus Faunce - Geometry, Descriptive - 1888 - 130 pages
...a line tangent to the circle, which is drawn with the revolved position of the centre of the sphere as a centre, and a radius equal to the radius of the sphere ; counter revolve the plane, together with the tangent line just found, to its original position ;...
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Exercises in Wentworth's Geometry: With Solutions

George Albert Wentworth - Geometry - 1896 - 296 pages
...II to 0C, OCNL is aa (g 182). .-. CW- OL and CNis II to OL. CONSTRUCTION. Draw OC= m, and II to AB. With C as a centre and a radius equal to the radius of O LP, describe an arc, cutting O NQ in N. Draw OL II to CN, and cutting O LP in L. Join LN. Then will...
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Observational Geometry

William Taylor Campbell - Geometry - 1899 - 268 pages
...a circle and determine the vertices of an equilateral inscribed triangle. With each of these points as a centre, and a radius equal to the radius of the circle, draw an arc within the circle and bounded by the circumference. 10. Construct an equilateral...
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Concrete Geometry: Introductory to Formal Plane Geometry

Theophilus Nelson - Geometry, Modern - 1902 - 154 pages
...How many degrees are there in the arc AB? What part of the circumference is the arc AB? Now with B as a centre and a radius equal to the radius of the circle draw an arc cutting the circumference at C, then with C as a centre and the same radius cut...
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Key to the Exercises in Wells' Plane and Solid Geometry

Webster Wells - Geometry - 1887 - 144 pages
...given O, and m the given radius. With P as a centre and a radius equal to m, describe an arc. With 0' as a centre, and a radius equal to the radius of the given О increased by m, describe an arc cutting the former arc at O. Then the О described with 0...
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