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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They are simply called intersecting arcs.
Lines that extend off the object to show what is being dimensioned
Adjacent Arcs
Circles have infinitely many arcs, not just 3.
the radius
compass
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Aircraft Drafting Ship Drafting/ Naval Drafting Structural Drafting SheetMetal Drafting Furniture Drafting Architectural Drafting Machine/ Mechanical Drafting Electronics / Electrical Drafting Topographical Drafting
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
"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."
vanier callipers
It is "a pair of compasses" - usually called a compass.
prewriting and drafting
They are simply called intersecting arcs.
Yes, there can be congruent arcs on a circle. Arcs which subtend the same angle at the center are considered as congruent.
drafting usually entails the mark up, refinement or ammendment of pre-existing drawings or sketches design involves the entire engineering process to get an idea into CAD