Geometry Courses's collection of geometry courses includes an introduction to geometry, basic geometry, and advanced geometry. Learners strengthen their geometry knowledge using comprehensive lessons, review games, and practice tests.

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What is Geometry?

Geometry is a branch of mathematics involving measurement, properties, and relationships of figures and spaces. The term geometry comes from the Greek words geo and metry for Earth and measurement, respectively. Geometry has various real-world applications, from construction and architecture to biology, arts, and animation. As one of the oldest branches of mathematics, geometry concepts were developed to solve problems involving land wealth, surveying, and astronomy. The study of geometry includes topology, trigonometry, algebraic geometry, and differential geometry. Like much of mathematics, geometry is interconnected with other branches of math. Geometry and algebra are both essential for concepts such as parallel lines and angle measurements. Geometry and probability are central in measuring sample spaces.

Geometry is a core element in comprehensive mathematics education. Students in preschool begin exploring skills and concepts in geometry. Beginner geometry concepts include a study of lines, angles, and polygons. Students learn how to calculate the area, perimeter, and volume of figures. Students also explore pi and circles. Secondary-level geometry courses explore the Pythagorean Theorem and its applications to right angles and distances. Typical high school geometry courses also introduce inductive and deductive reasoning and geometric proofs. An introductory college course in geometry consists of an overview of the measurement of two-dimensional and three-dimensional figures, theorems, axioms, and postulates.

Geometry skills and concepts are embedded in every grade level in most math curricula in the United States, with a specific course in high school. Technical vocabulary is essential in geometry, so including geometry definitions is vital in any instructional resource.

Geometry Lessons and Skills's Geometry Lessons and Skills section offers student and teacher resources for high school and college geometry. Whether students are learning about geometric properties, the Pythagorean Theorem, or logic and proofs,'s expert instructors provide in-depth explanations and examples to support learners at all levels. Our library includes thousands of geometry practice problems designed to help students learn and master elementary and advanced concepts.

Teachers save time on curriculum planning with access to lessons, activities, practice tests, and assessments. Using our discussion questions and extension activities, teachers can build students' conceptual understanding. Geometry teachers can view sample questions and instructional resources to aid lesson planning. Teachers can print lesson transcripts as a geometry study guide for test preparation.'s geometry lesson plans and activities are organized by topic or standard. Teachers can sort by content standards for over 40 states and the District of Columbia. Lesson sidebars also show related math concepts for extra support. Geometry teachers can track student progress using our dashboard and gain insights on skills to revisit with individual students or a class.'s integration with Google Classroom, Canvas, and Schoology allows seamless assigning with a click of a button. Teachers can schedule assignments and due dates.

Students can take control of their learning using's self-paced geometry lessons. Our geometry practice problems and video walkthroughs help learners develop geometry knowledge using illustrations, models, and real-world connections. Students can access definitions, geometry examples, and step-by-step explanations at any point during learning and practicing. Our geometry practice tests offer students immediate feedback and opportunities to review step-by-step answers for incorrect geometry questions. Students can access illustrated video lessons and personalized support to build their understanding and confidence in geometry.

Our college geometry resources help develop mastery of fundamental geometry skills and concepts for a typical introductory course. Students can access thousands of video walkthroughs, explanations, and practice problems. provides flexibility for busy college students by offering proctored final exams directly on the site. Geometry course transcripts can be requested and sent to any accredited school.

Explore our geometry collection for fun and standards-aligned learning materials.

Geometry Test Prep offers math test-prep courses that cover geometry as well as other math topics. Younger students can review basic geometry as they prepare for the ISEE exam. Prospective teachers will appreciate the review of more advanced geometry and mathematical concepts as they study for their licensure tests. These review courses cover all the important topics that will be on the individual tests and are designed to be easy to use and learn from.

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