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Plans and Elevations
• 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
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
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.
Plans and elevations
Plan
Side elevation
Front elevation
Sketch the plan, side elevation and front elevation of the cuboid.
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
Plans and elevations
Plan
Side elevation
Front elevation
Sketch the plan, side elevation and front elevation of this triangular prism.
Plans and elevations
Frontelevation
Plan
Side elevation
Plans and elevations
Plan
Side elevation
Front elevation
Sketch the plan, side elevation and front elevation of this cylinder.
Plans and elevations
Plan
Front elevation Side elevation
Plans and elevations
Plan
Side elevation
Front elevation
Sketch the plan, side elevation and front elevation of this cone.
Plans and elevations
Plan
Front elevation Side elevation
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.
Plans and elevations
Plan
Front elevation Side elevation
Plans and elevations
Plan
Side elevation
Front elevation
Sketch the plan, side elevation and front elevation of this ‘upside-down’ truncated cone.
Plans and elevations
Plan
Front elevation Side elevation
PLANS AND ELEVATIONSCORRECT SHAPE
Satisfy the given CONDITIONS
MEASUREMENT MUST BE ACCURATE
LATERAL INVERSION is not accepted(SONGSANG SISI TIDAK DITERIMA)
15b(ii).
Hidden line
losing marks
15
Case 1:Double line
Bold line
15a.
Case 2 :Sizes – Bigger or Smaller
Case 3:extension
Case 4 :gap
15
Case 5:Not a right angles
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
