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INTRODUCTION
 When Surfaces of a solid are laid out on a plane the
figure obtained is called DEVELOPMENT
METHODS OF DEVELOPMENT
There are four main types of developments
 Parallel- line development
 Radial –line development
 Triangulation development
 Approximate Method
PARALLEL-LINE DEVELOPMENT
 It is employed in case of prisms and cylinders in which
stretch –out-line principle Is used.
RADIAL-LINE-DEVELOPMENT
 It is used for pyramids and cones in which the true
length of the slant edge or the generator is used as
radial.
TRIANGULATION DEVELOPMENT
 This is used to develop transition pieces. This is simply
a method of dividing a surface into a number of
triangles and transferring them into the development.
APPROXIMATE METHOD
 It is used to develop object of double curved or warped
surface as Sphere, Parabolic, Ellipsoid, Hyperboloid
and the Helicoids.
WHAT IS CUBE
 In geometry a cube is a three-dimensional solid
object bounded by six square faces, facets or sides,
with three meeting at each vertex.
CUBE
 The development of the surface of the cube consist of
six equal squares the length of the side of the squares
being equal to the length of the edge of the cube
DEVELOPMENT OF CUBE
Development of surfaces

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Development of surfaces

  • 1.
  • 2.
  • 3. INTRODUCTION  When Surfaces of a solid are laid out on a plane the figure obtained is called DEVELOPMENT
  • 4. METHODS OF DEVELOPMENT There are four main types of developments  Parallel- line development  Radial –line development  Triangulation development  Approximate Method
  • 5. PARALLEL-LINE DEVELOPMENT  It is employed in case of prisms and cylinders in which stretch –out-line principle Is used.
  • 6. RADIAL-LINE-DEVELOPMENT  It is used for pyramids and cones in which the true length of the slant edge or the generator is used as radial.
  • 7. TRIANGULATION DEVELOPMENT  This is used to develop transition pieces. This is simply a method of dividing a surface into a number of triangles and transferring them into the development.
  • 8. APPROXIMATE METHOD  It is used to develop object of double curved or warped surface as Sphere, Parabolic, Ellipsoid, Hyperboloid and the Helicoids.
  • 9. WHAT IS CUBE  In geometry a cube is a three-dimensional solid object bounded by six square faces, facets or sides, with three meeting at each vertex.
  • 10. CUBE  The development of the surface of the cube consist of six equal squares the length of the side of the squares being equal to the length of the edge of the cube