Any two parameters will define an arc, but most common are:
Arc Length (L)
Radius (R)
Central Angle (CA or the 'delta' symbol, which I cannot reproduce, here.)
In surveying, the Long Chord (LC) is sometime used, giving the bearing and distance from the arc beginning to its ending.
Also, in highway and railroad work, the degree of curve (g), or 'sharpness of the curve are specified. If you use 'g', be aware that the equation for highway 'g' is not quite the same as 'g' for railroads. (Highway factor for 'g' is 5729.58, while the railroad factor for 'g' is 5730.00)
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Lines that extend off the object to show what is being dimensioned
They are simply called intersecting arcs.
Adjacent Arcs
Circles have infinitely many arcs, not just 3.
the radius
compass
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In drafting, various instruments are used to create precise technical drawings. Common tools include pencils for sketching, rulers and straightedges for drawing straight lines, compasses for arcs and circles, and protractors for measuring angles. Additionally, drafting boards and templates help maintain accuracy and consistency in designs. Digital drafting software, such as AutoCAD, has also become essential in modern practices, allowing for more efficient and versatile design capabilities.
Drafting tools serve various purposes in creating precise and accurate drawings. For instance, a T-square is used to draw horizontal lines and ensure alignment, while a protractor helps measure and draw angles. Compasses are essential for creating arcs and circles, and scales assist in measuring and scaling drawings accurately. Additionally, drafting pencils and erasers allow for detailed work and corrections, making the drafting process more efficient and effective.
Aircraft Drafting Ship Drafting/ Naval Drafting Structural Drafting SheetMetal Drafting Furniture Drafting Architectural Drafting Machine/ Mechanical Drafting Electronics / Electrical Drafting Topographical Drafting
"The supplies you need to go to drafting school is usually a pencil, erase, paper, and a desk with a slanted top. Sometimes you need a ruler if you cannot draw straight lines."
A magnetic compass is used to find direction and (hopefully) gain orientation. A compass used for drafting or drawing is used in the construction of circles or circular arcs. Use the links below for more pawn
vanier callipers
It is "a pair of compasses" - usually called a compass.
In drafting, various measurement tools are essential for accuracy and precision. Common tools include rulers and straightedges for linear measurements, protractors for angles, and calipers for detailed measurements of small objects. Additionally, scales are used to create proportional representations of larger objects, while drafting compasses assist in drawing arcs and circles. Digital tools like CAD software are also increasingly popular for precise measurements and designs.
The seven areas of drafting are: architectural drafting, civil drafting, mechanical drafting, electrical drafting, electronics drafting, aeronautical drafting, and marine drafting.