|Class 6 Maths Understanding Elementary Shapes||Three Dimensional Shapes|
Three Dimensional Shapes
The shapes which can be measured in 3 directions are called three-dimensional shapes. These shapes are also called solid shapes. Length, width, and height (or depth or thickness) are the three measurements of the three-dimensional shapes. Sphere, cone, cylinder, cuboid, cube are examples of three-dimensional shape.
Faces, edges and vertices:
Let us consider cube.
Each side of the cube is a flat surface called a flat face or simply a face.
When two faces meet at a line segment then it is called an edge.
Three edges meet at a point called a vertex.
Problem: What shape is:
(a) Your instrument box? (b) A brick? (c) A match box?
(d) A road-roller? (e) A sweet laddu?
(a) An instrument box has shape of cuboid.
(b) A brick has shape of cuboid.
(c) A match box has shape of cuboid.
(d) A road-roller has shape of cylinder.
(e) A sweet laddu has shape of Sphere.