## How do you find the projection of a line?

If a, b, c are the projections of a line segment on coordinate axis then the length of the segment = √(a2 + b2 + c2) If a, b, c are the projections of a line segment on coordinate axis then its dc’s are ± a/√(a2 + b2 + c2), ± b/√(a2 + b2 + c2), ± c/√(a2 + b2 + c2)

## What is projection of lines in engineering drawing?

The figure or view formed by joining, in correct sequence, the points at which these lines meet the plane is called the Projection of the object. The lines or rays drawn from the object to the plane are called Projectors. The transparent plane on which the projections are drawn is known as Plane of Projection.

**What is projection and its type?**

Projection are defined as mapping of three-dimensional points to a two-dimensional plane. There are two type of projection parallel and perspective.

### What is projection of point and line?

PROJECTION OF STRAIGHT LINES It is a one-dimensional object having only length (l). The projection of straight line are obtained by joining the top and front views of the respective end points of the line. The actual length of the straight line is known as true length (TL).

### What are projections of a point?

A projection is the transformation of points and lines in one plane onto another plane by connecting corresponding points on the two planes with parallel lines.

**What is projection point?**

• When a line is perpendicular to a plane, its projection on that plane is a point, while its projection on the other plane is perpendicular to the xy line and equal. to its true length.

## What is called projection?

projection, the mental process by which people attribute to others what is in their own minds. For example, individuals who are in a self-critical state, consciously or unconsciously, may think that other people are critical of them.

## What is an example of a projection?

Examples of Projection A wife is attracted to a male co-worker but can’t admit her feelings, so when her husband talks about a female co-worker, she becomes jealous and accuses him of being attracted to the other woman. A man who feels insecure about his masculinity mocks other men for acting like women.

**What is the projection point?**

If you drop a perpendicular from a point to a line or plane, the point you reach on that line or plane is called the projection of the point onto the line or plane.

### What are the 4 standard types of projections?

Projection Methods Used In Mechanical Drawing

- Orthographic Projection. Orthographic projection shows a 3D object in two dimensions so that you can see three views: the front view, side view and top view.
- Axonometric Projection.
- Oblique Projection.
- Perspective Projection.

### What is the definition of projection line?

Unsourced material may be challenged and removed. In mathematics, a projective line is, roughly speaking, the extension of a usual line by a point called a point at infinity.

**What are projection lines in technical drawing?**

Geometry

## What is a straight line projection?

figure using which any object like a machine component or a structural element is represented. Thus projection of a straight line is the foundation of Engineering Drawing. projections of two points gives the projection of the straight line joining the two points. As per ISO convention the first angle of projection is used.

## What is linear projection?

I’ll add a bit to this one. Basically, linear projections are mapping a high-dimensional space that is flat on all axes to a lower-dimensional space that is flat on all axes. So, if you wanted to represent stuff stacked in a cardboard box on a line, you could project the box’s space to a line (or piece of yarn).