1. Visualizing Solid Shapes

Chapter -15

Visualizing Solid Shapes

Measurement of the shapes from a certain angle or direction is called dimension.
The closed figures drawn on a flat-surface or on a plane are two-dimensional shapes. The sides of these shapes can contain straight or curved surfaces. The shapes can have 'n' number of sides.
2-D shapes are also called as plane figures
Three-dimensional shapes
Our entire world is made up of objects that occupy space. Any object or a shape that occupies space is three-dimensional.
The 3-D figures are also called as solid figures.
The flat surface of a solid shape is its face. A solid shape can have 'n' number of faces.
The line segment on a solid shape is called an edge.
The point where two or more edges join is a corner or vertex of a solid shape.
Oblique sketching is a pictorial representation of an object, in which the diagram is intended to depict the perspective of objects in three dimensions.
Isometric sketch is similar to oblique sketching but the solid figure is represented on an isometric sheet.
An isometric sheet will have dots in small equilateral triangles all over the sheet. The distance between each dot in the graph is usually considered as scale of 1cm.
A cross-section is the new face of the object we get when we slice the object from any direction. The newly formed face will always resemble a two-dimensional shape.
Shadow play is one of the ways of viewing solids. When light falls on an object, the resultant shadow thus formed is two-dimensional.

Related Chapter Name