What is meant by development of surfaces?
A development is the unfold/unrolled flat / plane figure of a 3-D object. Called also a pattern, the plane may show the true size of each area of the object. When the pattern is cut, it can be. rolled or folded back into the.
What are the methods of development of surfaces?
Parallel-line development: Used for prisms, cylinders etc. in which parallel lines are drawn along the surface and transferred to the development. Radial-line development: Used for pyramids, cones etc. in which the true length of the slant edge or generator is used as radius.
What is the significance of development of surfaces?
Surface development is the process of mapping a given 3D surface into a 2D shape. The usual objective is to achieve this mapping while preserving isometry, or, for non-developable surfaces, to minimize the distortion.
What is development of surface of solids What are methods of development?
Methods of development of surfaces are: ➢ Parallel line development. ➢ Radial line development. ➢ Triangulation development. ➢ Approximate development.
What is the development of cylinder?
A cylinder is one of the easiest geometrical solids to develop using graphical methods. To start with you should draw your cylinder in both plan and elevation. Then divide your plan view (which should be a circle) into equal segments.
What is the development of lateral surface of a cone?
The correct option is “C”. “When the curved surface of a cone is opened and laid on a plane, it shows the shape of a sector. The radius of the sector will be equal to the slant height of the cone. The length of the arc will be equal to the circumference of the base of the cone, i.e. 2πr.
Which method is used for drawing development of Prism?
Which method of development is employed in case of prisms? Explanation: Parallel-line method is employed in case of prisms and cylinders in which stretch out-line principle is used. Radial-line development is used for pyramids and cones in which the true length of the slant edge or the generator is used as a radius.
What is Lune method?
In plane geometry, the crescent shape formed by two intersecting circles is called a lune. In each diagram, two lunes are present, and one is shaded in grey.
What is the shape of development of lateral surface of cylinder?
In gen- eral, the development of lateral surface of a cylinder is a rec- langle having one side equal to the circumference of its base circle and the other equal to its length.
What is cylinder in technical drawing?
Drawing cylinders in an isometric pictorial is just a matter of drawing two circles and adding some connecting lines. The height is equal to the height of the cylinder and the width and depth are equal to the diameter of the cylinder.
What is shape of development of lateral surface of cylinder?
In gen- eral, the development of lateral surface of a cylinder is a rec- langle having one side equal to the circumference of its base circle and the other equal to its length. In an oblique cylinder some angle to the oblique cylinder, the axis of the solid is inclined at angle to the plane of its circular base.
What is the formula for finding the angle in the development of cone?
Angle = (D1 x 360) / D2 D2 = the diameter is of the developed cone, which you get from the elevation of your cone (see diagram below)
How is surface development used in technical drawing?
Surface development is the the process of revealing the true shape of a flat surface that has been curved or bent. For example a round cylindrical shape can be rolled out flat, to reveal a square. Q: What is surface development in technical drawing?
How to draw the lateral surface of a solid?
Draw the development of the lateral surface of cut solids by finding the points common between the surface lines of the solid and the plane that cuts the solid, and by locating these points on the surface lines of the development at true distances from the respective end points
Which is a development of 3-D engineering drawing?
A development is the unfold/unrolled flat / plane figure of a 3-D object. Called also a pattern, the plane may show the true size of each area of the object. When the pattern is cut, it can be rolled or folded back into the original object.
What makes a single curved surface an approximate development?
Single curved surfaces are composed of consecutive pairs of straight-line elements in the same plane. An approximate development is one in which stretching or distortion occurs in the process of creating the development. The resulting flat surfaces are not the same size and shape as the corresponding surfaces on the 3-D object.