Modern carpentry and joinery : being a compilation of the very best things and most modern and practical methods known in the arts of carpentry and joinery (1910)
Hodgson, Frederick Thomas, 1836- · Chicago : F. J. Drake & Co. · leaf 29
are then partly closed so as to form, an angle, we havean angle formed by two planes, and this angle is thesame as that formed by two lines which have beendrawn perpendicular to the line of intersection of thetwo planes. These lines in effect determihe a thirdplane perpendicular to the arris. If,… … I. Vertical and Horizontal Projections. II. Perspective VievFig. 12. SOLID GEOMETRY 27 point E, and suppose a plane passing through thatpoint cutting the two given planes perpendicular tothe arris. There results from the section a triangleD E F, inclined to the horizontal plane, and the angleof…
Carpentry
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