**1 Answer**

written 7.7 years ago by |

This one is bit tricky since many edges are not parallel to any principal (x, y, z) axes.

The procedure is as follows:

Draw base lines a-b-c-d-e and f-g-h which are parallel to principal axes.

From top most edge, draw i - j (40mm). Join j – e

Parallelogram

**ijkl**can be constructed easily as the edges are parallel to either xor zaxes.Now we need to locate nand vwhich is achieved by first locating m and p

**m**lies 15mm below**l**, so just draw lmparallel to y-axesPoint

**p**lies (also v) on the slope as seen in LHSV of the question. But vcannot be located directly.To locate

**p**, first draw kq parallel to je**q**is any arbitrary pointNow from m draw line parallel to z axis. The point of intersection with kq is p

Now, v lies 15mm to the left of p.

Locate r 15mm below n (70-40-15 = 15)

Parallelogram rstu can be drawn as their edges are parallel to either x or z axis

Join s – t, t – g and u – h

Done.