Descriptive geometry for students in engineering science and architecture; a carefully graded course of instruction . Fio. 55- A plane /,.1/.V containing AB intersects ^r in the line passing through V and Hand shown in plan and at vH and I .1/. 50 DESCRIPTIVE GEOMETRY When the plan of the line AB, namely, ab, is produced to meet the plan ofthis intersection line, namely, vH, the plan of the intersection point is found atP, and P, the elevation of it, can be at once obtained. Be careful to note that if a vertical plane is used in which to contain the givenline, then the elevation of
Descriptive geometry for students in engineering science and architecture; a carefully graded course of instruction . Fio. 55- A plane /,.1/.V containing AB intersects ^r in the line passing through V and Hand shown in plan and at vH and I .1/. 50 DESCRIPTIVE GEOMETRY When the plan of the line AB, namely, ab, is produced to meet the plan ofthis intersection line, namely, vH, the plan of the intersection point is found atP, and P, the elevation of it, can be at once obtained. Be careful to note that if a vertical plane is used in which to contain the givenline, then the elevation of the intersection will meet, or cross, the elevation of theline, or the line produced, at the elevation of the intersection point required, andthat if a plane perpendicular to the is used to contain the line, it will be theplan of the intersection line that will meet the plan of the given line in the planof the intersection point required. EXERCISE XXI I. Find the intersection, showing it by plan and elevation, of the line AB with the plane/?5r in each of the cases ^, 5 and Y 1 2. Find the distance of the point A from the plane RST at D. 3. Find the projections of the intersection line in each of the cases at E, F, G and H whereplanes are arranged so as to intersect each other. Work to a large scale. CHAPTER VIIIPARALLEL PLANES Section 16. It needs no demonstration to realize that planes parallel to oneanother will meet the planes of projection in parallel trace lines. In Fig. 56 at (i) two vertical planes are shown, and it is evident that the dis-tance between these planes is not the distance between their Vertical Traces,which may be, for these planes, a varying distance apart according to the angle
Size: 1792px × 1395px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcetc, bookyear191
