The curvature of the earth is taken into account when the extent of area is more than ____.
A. 100 km²
B. 50 km²
C. 250 km²
D. 350 km²
Answer:C
The curvature of the earth is taken into account when the extent of area is more than ____.
A. 100 km² B. 50 km² C. 250 km² D. 350 km²