Some articles on horizontal angle, angles, horizontal angles:
... circumferentor) and semicircles (see graphometer) were used to obtain either vertical or horizontal angle measurements ... a single instrument that could measure both angles simultaneously ... name "theodolite" described an instrument for measuring horizontal angles only ...
Famous quotes containing the word horizontal:
“I am a sort of martyr, as you see,
A horizontal monument to patience.
The calves of waitresses parade about
My helpless head upon this sodden floor.
Well, I am down again, but not yet out.
O sweet frustrations, I shall be back for more.”
—Richard Wilbur (b. 1921)