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What does oblique mean?
Neither parallel nor perpendicular. It's slanted or at an angle.
In Oblique projections the X and Z axes always________________________.
Form a 90° angle.
Which angle is most commonly used for the X and Y axes in Oblique projections?
135° angle
In the Oblique projection of a cube the X and Y axes give the _________ and _________ of the figure.
height , width
What is Axonometric projection?
A type of Multiview orthographic projection used to represent three-dimensional objects on a two-dimensional Surface.
What are the basic elements of Axonometric projection?
Three intersecting coordinate planes. Three axes ( X, Y and Z) .
What are the three most common types of Axonometric projection?
Isometric, Dimetric and Trimetric projection.
Define Isometric projection.
A type of Axonometric projection in which the axes form 3 equal angles.
Define Dimetric projection.
A type of Axonometric projection in which two of the three angles are equal.
Define Trimetric projection.
A type of Axonometric projection in which none of the angles are equal.
What is a dimensioned sketch?
A drawing that shows the shape of a three-dimensional object along with the measurements of the object.
The proportions of a dimensioned sketch should be approximately ____________.
accurate
Sketches should give ________________________________.
all the necessary information about an object
What are the essential elements for labelling a dimensioned sketch?
Dimension or measurement lines, Extension lines and Dimension or measurement values.
What are Extension lines in Dimensioned sketches?
They are the lines that join the dimension lines to the side of the object that is represented.
In dimension sketches all measurements are assumed to be in _______________.
millimetres
