Perspective and geometrical drawing adapted to the use of candidates for second and third-class teachers' certificates . 84 DRAWING. Example 1.—5)raw the frustum of a square pyramid, whosebases are 6^ and 4 square, respectively; the frustum 4^ to right, height 4. (Fig. 49.) Prom the above the method of drawing may be easilyunderstood. Example 2.—A pyranaid with square base, each side ofwhich is 4, stands on the ground plane 4^ to the left, touch-ing The pyramid is 8 in height; 3^ from the vertexthe pyramid passes through a square plinth 4 x 4 x^l placedparallel to the ground p
Perspective and geometrical drawing adapted to the use of candidates for second and third-class teachers' certificates . 84 DRAWING. Example 1.—5)raw the frustum of a square pyramid, whosebases are 6^ and 4 square, respectively; the frustum 4^ to right, height 4. (Fig. 49.) Prom the above the method of drawing may be easilyunderstood. Example 2.—A pyranaid with square base, each side ofwhich is 4, stands on the ground plane 4^ to the left, touch-ing The pyramid is 8 in height; 3^ from the vertexthe pyramid passes through a square plinth 4 x 4 x^l placedparallel to the ground plane. The pyramid cuts the plinthcentrally. H = 6^ = 4^, scale \; = V. (Fig. 50.). Fig. 50. By a careful observation of the lines drav/n above, themethod may be easily seen. FRUSTA. 85 Exercise XII. (H. = 6^ = 4; scale Y = !•) 1. A pyramidal frustum with square base, and verticalheight 4, touches 4 to right, resting on ground plane;the sides of the square are 3 and 6 respectively. 2. Draw a pyramidal frustum same as No. 1, 3^ to left, and3 within 3. Draw a triangular frustum (equilateral), sides of base5 and 3 respectively, height 4^; on 4 to right and 4within , vertex away, one edge parallel to 4. Draw a square pyramidal frustum, height 4^, sides ofsquare 2 and 4 respectively, standing on reversed,directly in front, V within 5. Draw a conical frustum, height 5, diameters 5 and 3respectively, on , and touching 4 to right. 6. Draw No. 5, 6 to left and 3 within 7. Draw same, directly in front, 3 within and 3above 8. Draw a hexagonal frustum, height 5, sides of bases 3and 2 respectively, touching , re
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