1.  Leonhard Euler By: Hannah Coggeshall

2.  Birthdate- 1707  Place- Basel, Switzerland  Place of study- University of Basel, Masters in Philosophy, St. Petersburg Academy of sciences  Work place- St. Petersburg and Berlin  Physics Professor  800 mathematical papers  1766- completely blind, 69

3. Contributions  Euler's theorem- Every rotation has an axis  Euler’s Formula- Exponentials and imaginary numbers  Optics, mechanics, electricity, and magnetism  Differential Equations- Unknown function that of one or Several variables that relates the values of the function itself. Moons location and planets location from the sun and moon and their lunar orbit.  Topography  Seven Bridges of Konigsberg/ graph theory  π

4. Graph theory  Figured out how to solve The seven Bridges of Konigsberg  First theorem of graph theory and planar theory  V − E + F = 2 relating the number of vertices, edges and faces of a convex polyhedron – Convex set of points N- Dimensional space

5. Changes  Taught in schools  Contributes to architecture  Helped find shorter routes, on bridges and roads  Provided the foundation for studying graphs w/ general degree distributions –Probability Distribution of degrees over the whole network