Harold Jacobs once wrote, "Mathematics is not a spectator sport." Whether you hold the weathered 1974 hardcover, a 2018 Master Books edition, or a grainy on a tablet, the magic remains in the doing .
For two-column proofs, Jacobs suggests a brilliant habit: write down everything you know about the diagram before you start writing the proof. Use your PDF to create a "Given & Diagram" worksheet. Do this for all 17 chapters. geometry harold jacobs pdf