Engineering Drawing
This is a line terminated by arrowheads, indicating the direction and extent of a dimension:

Extension line
Dimension line
Arrowhead line
Centerline

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Engineering Drawing
When using the descriptive geometry method to create an auxiliary view the drafter should _________.

Rotate the top line of the front view 45 degrees
Offset the top line of the front view 2 inches
Rotate the snap grid to the same angle of the inclined plane
Offset the right vertical line of the front view

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