If you ask any student to name the most difficult school subjects, you will almost certainly hear complaints about incredibly complex and incomprehensible geometry in response. For many, it is a stumbling block, but not for the students of the "Second School" in Moscow, because they study with the authors of this book - mathematics teachers Alexander I. Malakhov, Pavel Vitalievich Bibikov and Konstantin Vladimirovich Kozerenko. If you're also struggling with geometry or, conversely, want to learn more about your favorite subject, this book is for you. Open the book as soon as possible - rats and ghosts are waiting for you there...