Cube & Tetrahedron: Worked Problems (Leaving Cert DCG): Flashcards
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Practise the cards
10 cards from this deck
How are auxiliary views oriented to principal views?
How are auxiliary views oriented to principal views?
Perpendicular to one of the principal views
Hinge line function
Hinge line function
Connection between main and auxiliary views; used to transfer measurements perpendicular to it
Parallel lines in 3D in orthographic projection
Parallel lines in 3D in orthographic projection
Remain parallel in any orthographic view
Viewing direction needed to see true shape of surface
Viewing direction needed to see true shape of surface
Perpendicular to that surface
Purpose of auxiliary views
Purpose of auxiliary views
Finding true lengths and true shapes that are foreshortened
Tetrahedron base on horiz. plane - view showing true shape
Tetrahedron base on horiz. plane - view showing true shape
Plan view
Inscribed sphere in tetrahedron constraint
Inscribed sphere in tetrahedron constraint
Only one size of tetrahedron fits around sphere of given radius
Two stages of finding true shapes
Two stages of finding true shapes
Find edge view, then create view perpendicular to that edge
Orthographic projection maintains what between views?
Orthographic projection maintains what between views?
Parallel projection lines between all views
Point alignment between views rule
Point alignment between views rule
Points aligning in one view must align consistently in all views