82. Constructions using a compass and ruler. Part 2
In this lesson, we'll prove the equivalence of compass-and-straightedge construction on the coordinate plane and calculations on a "quadratic calculator," and we'll also learn how to construct a regular pentagon.
00:00 Equation of a Line
09:14 Intersection of Lines and Circles
13:22 Construction of a Regular Pentagon
15:43 Construction of a Regular Pentagon (continued)