Surveying
If E is the spherical excess and R the radius of the earth, the surface area of the triangle, is

πR²E/90°
πR²E/180°
πR²E/360°
πR²E/270°

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Surveying
Pick up the correct statement for horizontal photographs.

The lines parallel to the negative plane are projected as parallel lines
The two sides of a road meet at the vanishing point
All listed here
Parallel lines do not appear parallel in central projection

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