Explore the intricate connections between algebra and geometry in this MANSW presentation for mathematics teachers. Delve into topics such as basic arithmetic in geometry, the Euclidean algorithm, continued fractions, and projective geometry, including Pappus' theorem and Pascal's theorem. Gain insights that could spark renewed interest in geometry as a core subject for school students. Discover how these fundamental mathematical concepts intertwine, providing a deeper understanding of both algebraic and geometric principles.