The Milky Way's name stems from the Greeks, who refers to the galaxy as galaxias kyklos or milky circle. The Romans, who called it via lacteal, or "The road of milk" altered the term from its original Greek origins.
Explanation: The asthenosphere exerts a buoyant force that pushes up against the lithosphere, and this force resists gravity. The theory of isostasy refers to an equilibrium in buoyancy between the lithosphere and the asthenosphere.
Because when you add 27 and 39 together you get 66. And the interior of a triangle equals 180 so now you must subtract the 66 from 180. And once you do that you get 114 degrees.