The most frequently used manual is by E.N. Balayan . It is widely considered a "must-have" for teachers to conduct quick quizzes and for students who want to "level up" their problem-solving speed.
It doesn't replace the need for traditional problems that require translating text into a drawing. Popular Resources
Sum of angles, isosceles triangle properties, and the three signs of triangle congruence.
Finding unknown angles based on their relationships.
Students might get used to "guessing" and struggle with writing out formal proofs.