Isometric projection is a type of
Show Hint
- Axonometric projection
- ... Orthographic projection
- Oblique projection
- Perspective projection
The Correct Option is A
Solution and Explanation
One-plane pictorial projections are broadly divided into three main categories:
• Axonometric Projection: Parallel rays of projection meet the projection plane perpendicularly, but the object itself is rotated relative to the plane to reveal multiple faces.
• Oblique Projection: Parallel projection rays meet the projection plane at an oblique (non-perpendicular) angle.
• Perspective Projection: Projection rays converge at a point (the station point/eye of the observer), replicating human vision.
Step 2: Sub-classification of Axonometric Projections:
Axonometric projections are further sub-divided based on the angles that the three principal axes make with the projection plane:
• Isometric Projection: All three angles are equal ($\alpha = \beta = \gamma = 120^{\circ}$).
• Dimetric Projection: Two of the angles are equal.
• Trimetric Projection: All three angles are unequal.
Step 3: Final Conclusion:
Since isometric projection is mathematically a subset of axonometric projection (where all three axes are equally foreshortened), option (A) is the most precise classification.
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Select the correct statements for the given figure.
(i) A horizontal pyramid is placed with its axis parallel to both H.P. and V.P.
(ii) The solid has three triangular faces in total.
(iii) A horizontal pyramid is placed with its axis perpendicular to V.P.
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The above given top view corresponds to
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(ii) A sphere of diameter 70 mm is placed on the top face of a prism.
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(iv) The axis of prism is perpendicular to V.P. and one of its base edges is parallel to H.P.
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