Which northern european renaissance artist is known as the "leonardo of the north"? his most important works were not paintings but engravings.
a. albrecht durer
b. pieter bruegel
c. hans holbein, the younger
d. jan van eyck

The northern European Renaissance artist known as the "Leonard of the North" was a) Albrecht Durer. Albrecht Durer was a painter, printmaker, and theorist in the German Renaissance. He involved a vast number of different aspects into his work such as mathematics, perspective and ideal proportions and since he knew many Italian artists and German humanists, he became one of the most important figures in the Northern Renaissance.

Use the formula: (n-2)×180, where n is the number of sides(18-2)×180= 28800, now this is the full exterior angle of 18-gon so you divide it by 18.28800÷18=160