Developments (Leaving Cert DCG): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
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Practise the cards
10 cards from this deck
What is a development?
What is a development?
Unfolding a 3D object's surface onto a flat plane
Fold lines in technical drawings
Fold lines in technical drawings
Shown as dashed lines
Fundamental rule of developments
Fundamental rule of developments
All lines true lengths, all surfaces true shapes
Cylinders unfold into
Cylinders unfold into
Rectangle (curved surface) + 2 circles (ends)
Cylinder rectangle width equals
Cylinder rectangle width equals
Circumference of the cylinder
Pyramids unfold into
Pyramids unfold into
Triangular faces meeting at common apex
Cones unfold into
Cones unfold into
Sectors (part of a circle)
Cone sector radius equals
Cone sector radius equals
Slant height of the cone
Fold lines vs cut edges marking
Fold lines vs cut edges marking
Dashed lines for folds, solid lines for cuts
Arc construction for pyramids - centre point
Arc construction for pyramids - centre point
Apex