33 degrees perpendicular to the horizon
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what is the formula for a vertical angle
The sign for a vertical angle is......(I don't know actually >.
Eratosthenes' method requires that one know or determine the vertical angle of the sun above the horizon or from the zenith (a point directly overhead) at solar noon at two locations along the same line of longitude. The distance between the two locations must also be known.
Yes.
Noon is when the sun is overhead or at its zenith for whichever part of the world you are on. The angle would depend on the time of year and your latitude.