What is an object line?

What is an object line?

A visible line, or object line is a thick continuous line, used to outline the visible edges or contours of an object. Hidden Line. A hidden line, also known as a hidden object line is a medium weight line, made of short dashes about 1/8” long with 1/16”gaps, to show edges, surfaces and corners which cannot be seen.

What is the visible line?

Visible Lines Visible lines represent visible edges and boundaries.

What are centerlines used for?

Centerlines are one of the most frequently used tools in engineering drawing. Their basic purpose is to show circular/cylindrical features in a drawing, which are found in abundance in mechanical parts. Common examples of such features include bolt holes, pins, discs, etc.

What are alphabet lines?

The Alphabet of Lines is a list of line symbols that engineers use in technical drawings to communicate specific shapes, sizes or surfaces. The lines and symbols used in the Alphabet of Lines are universal, which means engineers around the world use and understand them.

What are the three types of centerlines?

Line Conventions

  • Center lines. Center lines are used to indicate the center of a circle, arc, or any symmetrical object. ...
  • Visible Lines. The visible edge lines of the view are drawn as solid, thick lines. ...
  • Hidden Lines. ...
  • Extension Lines. ...
  • Dimension Lines. ...
  • Leaders. ...
  • Break Lines. ...
  • Phantom Lines.

What does a Dimension line look like?

The dimension line is a thin line, broken in the middle to allow the placement of the dimension value, with arrowheads at each end (see diagram below). An arrowhead is approximately 3 mm long and 1mm wide. That is, the length is roughly three times the width.

What are short break lines?

Short-Break Line: A freehand drawn line that shows where a part is. broken to reveal detail behind the part or to shorten a. long continuous part. Short-Break Line. Line Conventions.

What is center line in drawing?


What are the types of lines in drawing?

There are 5 main types of lines in art: vertical lines, horizontal lines, diagonal lines, zigzag lines, and curved lines. Other types of lines are simply variations of the five main ones.

What is projection line?

Projection lines. Projection lines are extensions of lines that assist in 2D drawing. You can use projection lines to help you create new geometry, and any constraints you create with them remain active even after you turn projection lines off.

What is a line?

In geometry, a line can be defined as a straight one- dimensional figure that has no thickness and extends endlessly in both directions. It is often described as the shortest distance between any two points. Here, P and Q are points on the line.

What is line example?

The definition of a line is a mark connecting two points, something stretched between two things, or two or more people standing in a row. An example of a line is a horizontal mark drawn on a piece of paper. An example of a line is caution tape marking off the scene of an accident. An example of a line is fishing wire.

How is a line named?

A line can be named either using two points on the line (for example, ↔AB ) or simply by a letter, usually lowercase (for example, line m ). A line segment has two endpoints. It contains these endpoints and all the points of the line between them. ... A segment is named by its two endpoints, for example, ¯AB .

What are the five basic types of lines?

There are 5 main types of lines in art: vertical lines, horizontal lines, diagonal lines, zigzag lines, and curved lines.

How many ways can a line be named?

12 ways

What's another name for line QR?

Another name for line QR would be line RQ.

How do you solve intersecting lines?

Here's the summary of our methods:

  1. Get the two equations for the lines into slope-intercept form. ...
  2. Set the two equations for y equal to each other.
  3. Solve for x. ...
  4. Use this x-coordinate and plug it into either of the original equations for the lines and solve for y.

How many points are on a line?

two points

How many points is enough to fix lines?

Two points

Can a line have one point?

A line has no end points. The length of a line cannot be measured. A line has no definite length. A line is named by any two points on it and written as line AB or line PQ.

What was the first straight line?

Thales was probably the first known scientist and engineer and is known for his advanced application of geometry which requires straight lines. The Romans were also good at creating long straight lines they used a device called a gromer for creating long and very straight roads.