Here are the shadows of some 3-D objects, when seen under the lamp of an overhead projector. Identify the solid(s) that match each shadow. $(There\ may\ be\ multiple\ answers\ for\ these!)$ "
Given: some shadows of some 3-D objects, when seen under the lamp of an overhead projector.
To do: To i dentify the solid(s) that match each shadow.
Solution:
We know that:
A spherical solid casts a shadow of a circular shape. A cylindrical solid casts a shadow of a linear or rectangular shape. A cuboidal solid casts a shadow of a rectangular shape. A conical solid casts a shadow of a triangular shape. A cubical solid casts a shadow of a square shape. Therefore, we can say:
$(i)$ A ball or sphere will give a shadow of a circle.
$(ii)$ A cube-shaped object such as dice will give the shadow of a square.
$(iii)$ An ice-cream cone or a birthday cap will give the shadow of a triangle.
$(iv)$ A book or a cuboid shape object will give the shadow of a rectangle.
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