Final answer:
Unequally spaced holes on a bolt circle can be dimensioned using either linear or angular dimensions. Linear dimensioning involves measuring the distance between each hole and a reference point along a straight line, while angular dimensioning involves specifying the angle between each hole and a reference line.
Step-by-step explanation:
Unequally spaced holes on a bolt circle can be dimensioned by specifying the distance between each hole and a reference point or a neighboring hole. The dimensioning can be done using either linear or angular dimensions. For linear dimensioning, the distance between each hole and the reference point is measured along a straight line. For example, the first hole may be dimensioned as 1 inch from the reference point, the second hole as 2 inches.
the third hole as 3 inches, and so on. Alternatively, angular dimensioning can be used, where the angle between each hole and a reference line is specified. For example, the first hole may be dimensioned as 0 degrees from the reference line, the second hole as 45 degrees, the third hole as 90 degrees, and so on.