## What are different methods of development of surfaces?

Every line on the development should show the true length of the corresponding line on the surface which is developed. Parallel-line Method: It is used for developing prisms and single curved surfaces like cylinders, in which all the edges/generation of lateral surfaces are parallel in each other.

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## What is the shape of the developed surface of a cone?

The development of a cone is shown in figure 4. For a cone, the front view will be a triangle with the slant edge showing the true length of the generator of the cone. To begin this development, use a true-length element of the cone as the radius for an arc and as one side of the development.

**Which method of development is employed in case of prisms?**

Parallel-line method

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.

**What type of method is used for developing pyramids and cones?**

radial line development

Cones and pyramids are developed using radial line development. Radial line development is the process used for developing patterns for cones and pyramids. For the radial line method to be used, all lines must radiate from a common centre.

### 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.

### What is cone development?

The apex will remain in a fixed location, while the base will trace out a circular arc on the surface, with a length equal to the circumference of the cone’s base. This generates the development for the cone, which is a sector of a circle with radius R and sector angle θ.

**What is the purpose of surface development?**

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 type of pattern development is used to make prisms and cylinders?**

Also known as stretchout. A pattern development method in which lines are projected at right angles to each other, used for prisms and cylinders.

## Which method is suitable for drawing the development of lateral surface of a prism or cylinder?

The lateral surface of oblique prism is developed by parallel line method as in case of right prisms (Fig.

## Which method is used to develop the lateral surface of square pyramid?

Radial-line Method: It is employed for pyramids and single curved surfaces like cones in which the apex is taken as centre and the slant edge or generator as radius of its development.

**What is the area of conical object?**

The formula for the base area of a cone is A = πr2, where r is the radius of the base of the cone. The formula for the base area of the cone can also be shown in terms of the diameter of a cone as A = π(D/2)2 = (πD2)/4, where D is the diameter of the base.

**What is conical geography?**

A conical hill is a landform with a distinctly conical shape. It is usually isolated or rises above other surrounding foothills, and is often of volcanic origin.

### Which method is used to develop the lateral surface of a square prism?

Parallel line method: It is used for development of prisms and single curved surfaces like cylinders in which the edges and generation of lateral surfaces is parallel to one another.