Question

Given (i) an oblique sketch and (ii) an isometric sketch for the following. A cube with an edge 4cm long.

Answer 1

Hint: An oblique has a more focus on the front side of an object or the face. Isometric sketch focuses on the edge of an object. Oblique sketches are usually using the 45 degree angle to render the third dimensions. Isometric sketches are usually drawn at an angle of 30 degrees to render third dimension.

Complete step-by-step solution -
Oblique Sketch: Oblique sketches are usually drawn using a 45 degrees angle to render the 3rd dimension. A projective drawing of which the frontal lines are given in true proportions and relations and all others at suitable angles other than 90 degrees without regard to the rules of linear perspective.

Oblique sketches is a simple type of technical drawing of graphical projection used for producing two-dimensional of three dimensional objects.

Isometric Sketch: Isometric sketches are usually drawn using a 30 degree angle to render the 3rd dimension. Isometric sketches or projections is a method for visually representing three- dimensional objects in two dimensions.

There are three main rules to isometric drawing:
a). Horizontal edges are drawn at 30 degrees.
b). Vertical edges are drawn as vertical lines.
c). Parallel edges appear as parallel lines.
The reason to draw at 30 degrees is because at 30 degrees all the three axes vary in the same proportion.

Note: Using Oblique sketches, the circular features appear as a circle, not as an eclipse. The three axes of the oblique sketches are vertical, horizontal, and at a receding angle that can vary between 30 degrees and 60 degrees. From the isometric sketching, one can take actual measurements of the object.