Developments (Leaving Cert DCG): Flashcards
📚Flashcards
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Practise the cards
10 cards from this deck
Definition of a development
Definition of a development
Unfolding a 3D object's surface onto a flat plane
How fold lines are shown in technical drawings
How fold lines are shown in technical drawings
Dashed lines
Fundamental rule: all lines & surfaces in a development
Fundamental rule: all lines & surfaces in a development
All lines are true lengths, all surfaces are true shapes
Width of rectangle in cylinder development
Width of rectangle in cylinder development
Equals the circumference of the cylinder
Shape a cone unfolds into
Shape a cone unfolds into
A sector (part of a circle)
Radius of cone sector in development
Radius of cone sector in development
Equals the slant height of the cone
What is a truncated prism?
What is a truncated prism?
A prism cut at an angle
Shape of pyramid development faces
Shape of pyramid development faces
Triangular faces meeting at a common apex
Generator method for cylinders/cones
Generator method for cylinders/cones
Divide circular plan into equal parts and project
Fold lines vs cut edges in developments
Fold lines vs cut edges in developments
Fold lines: dashed; cut edges: solid lines