Notes On Viewing the Different Section of Solids - CBSE Class 7 Maths
Visualising solid shapes is a very useful skill.  We can see the hidden parts of a solid shape.  For example, when a cuboid with a square face is cut vertically, then each face is a square. The face is a cross section of the cuboid.  Three-dimensional objects or solids have length, breadth and height, and look different from different points of view. Sections of solid shapes can be viewed using three ways:      •  Viewing the cross sections      •  Using shadows      •  Viewing at certain angles A solid can be viewed from different angles. Viewing a solid from the front, side and top are the three most common ways of viewing it. Cutting or slicing a solid will result in its cross-section, which is also one way of viewing it. Observing the two-dimensional shadow of a three-dimensional solid is another method of viewing a solid.  Shadows of solids are of different sizes depending on the position of the solid and the position of the source of light.

Summary

Visualising solid shapes is a very useful skill.  We can see the hidden parts of a solid shape.  For example, when a cuboid with a square face is cut vertically, then each face is a square. The face is a cross section of the cuboid.  Three-dimensional objects or solids have length, breadth and height, and look different from different points of view. Sections of solid shapes can be viewed using three ways:      •  Viewing the cross sections      •  Using shadows      •  Viewing at certain angles A solid can be viewed from different angles. Viewing a solid from the front, side and top are the three most common ways of viewing it. Cutting or slicing a solid will result in its cross-section, which is also one way of viewing it. Observing the two-dimensional shadow of a three-dimensional solid is another method of viewing a solid.  Shadows of solids are of different sizes depending on the position of the solid and the position of the source of light.

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