1) First angle and third angle symbols?

Question

Accepted Answer

The first angle symbol is denoted by a small dot in the upper left corner of the angle, while the third angle symbol is denoted by a small dot in the lower right corner of the angle.

The first angle symbol is used to represent the first angle in a three-angle projection system.
The third angle symbol is used to represent the third angle in a three-angle projection system.
These symbols are commonly used in engineering and technical drawings to indicate the orientation of an object in a three-dimensional space.
For example, in a three-view drawing of a cube, the first angle symbol would be placed in the upper left corner of the top view, while the third angle symbol would be placed in the lower right corner of the front view.

Accepted Answer

Drawn as per GD&T standard

1) First angle and third angle symbols?

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