As of 2015, the latest edition of Holt Geometry covers the properties of line segments, angles, two- and three-dimension shapes, geometric proofs and an introduction to trigonometry. Holt Geometry also emphasizes the use of mathematical logic to write geometric proofs.
Holt Geometry includes a thorough study of triangles, quadrilaterals, parallelograms, trapezoids, circles, cylinders, cubes, rectangular prisms, pyramids, cones and spheres. The practical use of the
Pythagorean Theorem and the graphing of geometric coordinates is also covered. Inductive and deductive reasoning and critical thinking skills are used throughout the course. The text concludes with an introduction to trigonometry and the logic used in computer programming.