Circle With Center o and Radius r with point P
Circle modeling the earth. O is the center of the earth, r the radius of the earth, and h the height of the point P above the surface; it is required to find the distance from the point P to the horizon at A.
Keywordstriangle, circle, earth, radius, surface, point, length, height, center, angle, triangles, radii, Horizon, Distance, trigonometry, trig
Claude Irwin Palmer Library of Practical Electricity: Practical Mathematics For Home Study (New York: McGraw-Hill Book Company, Inc., 1919) 435