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Third angle projection is in common use in the USA, Canada, and the UK. The rest of the world more commonly uses first angle. There is no inherent superiority of one projection over the other. When you are making drawings that may be used internationally, it's a very good idea to indicate by a small symbolic diagram which projection is in use. This diagram is usually a side and end view of a truncated cone.
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Why isometric drawing is started with 30 degree angle to horizontal line?
That's what an isometric drawing is: the third dimension is shown at a 30 degree angle to the horizontal. The number 30 isn't magic - any other number in that 'ballpark' would work - but it's an easy number ( a third of a right angle, and it's clearly different from 60 degrees, which is why 45 degrees wouldn't be great), and the resulting drawing makes the 3-D object easy to visualize.
What drawing has lines at 30 degrees?
A drawing of a 30 degree angle!
What is the measure of the third angle of a triangle if one angle measures 52 degrees?
The third angle is (128 degrees) minus (the second angle).
What is the angle used in oblique drawing?
30 Degrees
What is the measure of the third angle of a triangle is one angle measures 126.5 degrees and the other measures 19 degrees?
The third angle is 34.5 degrees
What are the 2 types of oblique drawing?
first angle projection and third angle projection.
What are the advantages of third angle projection over the first angle projection?
Neglecting term "opposite".. In third angle projection, what we see are what are we going to draw
How do you interpret first and third angle drawings?
First angle is interpretted by the drawing being positioned to the right of the section and third angle is interpretted by the elevation being positioned to the left of the section.
What is difference between 1st angle and 3rd angle projection?
Both third angle and first angle projection display the standard three orthographic views of a part or assembly on a drawing.. The key difference between third angle and first angle is the layout of the part on the sheet.
What is the disadvantage of using isometric drawings?
v Orthographic drawingØOrthographic drawings are orthographic projection drawings. These can be drawn at first angle projection and third angle projections.ØI am going to explain orthographic third angle projection drawing because I use them.ØIf I want to draw orthographic third angles projection drawing I have to follow some rules.ØThese rules are:ØThe view from the front is in the middle.ØThe view from the left is on the left.ØThe view from the right is on the right.ØThe view from the top is on the top.ØThe view from the bottom is on the bottom.ØThe view from the rear/back is on the far right.Example of orthographic third angle projection.Orthographic drawing advantageOrthographic drawing disadvantageEasy to recognized /read and understand by engineers.Hard to recognized by other people then engineers.Doesn't looks like at all to real design/picture.
Why isometric drawing is started with 30 degree angle to horizontal line?
That's what an isometric drawing is: the third dimension is shown at a 30 degree angle to the horizontal. The number 30 isn't magic - any other number in that 'ballpark' would work - but it's an easy number ( a third of a right angle, and it's clearly different from 60 degrees, which is why 45 degrees wouldn't be great), and the resulting drawing makes the 3-D object easy to visualize.
Which countries are using second angle of projection?
any country using in second r fourth angle projection r else what r the advantages between first angle and third angle projetion
What drawing has lines at 30 degrees?
A drawing of a 30 degree angle!
Can a triangle have an obtuse angle a right angle and an acute angle?
Yes you can by drawing it on a sphere
Why 30 degree angle is used in isometric?
isometric drawing create the illusion of 3 dimension by drawing the depth of the object on the both side.. in isometric drawing they are both set on the 30 degree angle..
What is the measure of the third angle of a triangle if one angle measures 52 degrees?
The third angle is (128 degrees) minus (the second angle).
What is the angle used in oblique drawing?
30 Degrees
