Cube & Tetrahedron: Worked Problems (Leaving Cert DCG): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Why are multiple views and auxiliary projections crucial in technical drawing of 3D solids?
Why are multiple views and auxiliary projections crucial in technical drawing of 3D solids?
They reveal info hidden/foreshortened
When must you create an auxiliary view in technical drawing?
When must you create an auxiliary view in technical drawing?
To find true lengths/shapes foreshortened
What is the function of the hinge line in auxiliary view construction?
What is the function of the hinge line in auxiliary view construction?
It connects main view and auxiliary view
How must the auxiliary plane be oriented relative to the principal plane?
How must the auxiliary plane be oriented relative to the principal plane?
Perpendicular to the principal plane
How do parallel lines in 3D space appear in orthographic views?
How do parallel lines in 3D space appear in orthographic views?
They remain parallel in any view
How must you view a surface to see its true shape?
How must you view a surface to see its true shape?
Perpendicular to the surface
What shows in true shape when a tetrahedron base rests on the horizontal plane?
What shows in true shape when a tetrahedron base rests on the horizontal plane?
The triangular base in plan view
Where does an inscribed sphere touch the faces of a tetrahedron?
Where does an inscribed sphere touch the faces of a tetrahedron?
At the centres of faces
How does a sphere appear in any orthographic view?
How does a sphere appear in any orthographic view?
As a circle
What two stages are needed to find true shapes of foreshortened surfaces?
What two stages are needed to find true shapes of foreshortened surfaces?
Edge view then view perpendicular to edge