planselevations-121128061639-phpapp01
TRANSCRIPT
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Plans and Elevations
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• to visualise and use 2-D representations of 3-D objects; analyse 3-D shapes through 2-D projections, including plans and elevations.
The objective of this lesson is
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This is a shadow of a solid shape.What solid shape could it be a shadow of?
Shape shadows
Sphere, cylinder or cone
This is another shadow of the same solid shape, but from a different direction.What is the solid shape?
Cylinder
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What words do we use for the views of solid objects from mutually perpendicular directions?
Plans and elevations
Whether a view is referred to as a plan or as a side elevation depends on the point of view of the observer.
Views from above are called plans.Views from the side are called side elevations.
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Plans and elevations
Plan
Side elevation
Front elevation
Sketch the plan, side elevation and front elevation of the cuboid.
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Plans and elevations
Front elevation
Plan
Take care to make the sides of the three views look correct in relation to each other.
Side elevation
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Plans and elevations
Plan
Side elevation
Front elevation
Sketch the plan, side elevation and front elevation of this triangular prism.
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Plans and elevations
Frontelevation
Plan
Side elevation
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Plans and elevations
Plan
Side elevation
Front elevation
Sketch the plan, side elevation and front elevation of this cylinder.
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Plans and elevations
Plan
Front elevation Side elevation
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Plans and elevations
Plan
Side elevation
Front elevation
Sketch the plan, side elevation and front elevation of this cone.
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Plans and elevations
Plan
Front elevation Side elevation
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Plans and elevations
Plan
Side elevation
Front elevation
Sketch the plan, side elevation and front elevation of this L-shaped block made from three cubes.
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Plans and elevations
Plan
Front elevation Side elevation
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Plans and elevations
Plan
Side elevation
Front elevation
Sketch the plan, side elevation and front elevation of this ‘upside-down’ truncated cone.
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Plans and elevations
Plan
Front elevation Side elevation
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PLANS AND ELEVATIONSCORRECT SHAPE
Satisfy the given CONDITIONS
MEASUREMENT MUST BE ACCURATE
LATERAL INVERSION is not accepted(SONGSANG SISI TIDAK DITERIMA)
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15b(ii).
Hidden line
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losing marks
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15
Case 1:Double line
Bold line
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15a.
Case 2 :Sizes – Bigger or Smaller
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Case 3:extension
Case 4 :gap
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15
Case 5:Not a right angles
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Y
X
Draw a full scale i. The plan of the solidii. the elevation of the solid as viewed from Yiii. the elevation of the solid as viewed from X