Ex.15.4 Q2 Visualising Solid Shapes - NCERT Maths Class 7
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!)
What is known?
Some shadow of solid shapes
What is unknown?
Solid shapes for each shadow
A spherical object gives a circular shape shadow.
A cylindrical object gives a shadow of a line.
A cubical object gives a square shape shadow.
A cuboidal object gives a rectangular shape shadow.
A conical object gives a triangular shadow.
Solids will be:
(i) A ball or sphere will give shadow of a circle.
(ii) A cube shape object like dice will give shadow of a square.
(iii) An ice- cream cone or a birthday cap will give the shadow of triangle.
(iv) A book or a cuboid shape object will give shadow of a rectangle.