Forget about proofs. Many panic when they think of geometry because they remember writing complex, often tedious proofs in high school. The GRE math section does not test knowledge of geometric proofs.
Enroll in a GRE prep course. Getting a high GRE math score involves more than intelligence and specialized knowledge. Preparatory courses review basic geometric principles and teach students to identify certain types of questions and answer them correctly. Learning how to spot trick questions can significantly raise your test score.
Buy additional study materials. Although your GRE course instructor may discourage purchasing outside supplies, get books and flashcards with geometry practice questions.
Learn formulas and how to apply them. Know how to calculate perimeter, area and volume. You'll also have to understand the Pythagorean theorem, coordinate geometry, the characteristics of circles and triangles and how to find the slope of a line.
Work problems and take practice tests. Become accustomed to the computer-based test format and to working within time constraints. Recreate the testing environment to the extent possible for each test you take at home. Carefully review missed questions and work similar problems until you firmly grasp concepts.