Geometry is, along with arithmetic, one of the oldest branches of mathematics. A mathematician who works in the field of geometry is called a geometer.

Geometry (all content) Unit 1: Lines Lines, line segments, and rays Measuring segments Parallel and perpendicular Points, lines, & planes Geometric definitions The golden ratio

Learn high school geometry—transformations, congruence, similarity, trigonometry, analytic geometry, and more. (aligned with Common Core standards)

Geometry, the branch of mathematics concerned with the shape of individual objects, spatial relationships among various objects, and the properties of surrounding space.

Geometry is the branch of mathematics that deals with the study of points, lines, angles, surfaces, and solids. Understanding these fundamental concepts lays the foundation for exploring more advanced topics in geometry.

This Basic geometry and measurement course is a refresher of length, area, perimeter, volume, angle measure, and transformations of 2D and 3D figures. If you are learning the content for the first time, consider using the grade-level courses for more in-depth instruction.

Geometry is a branch of mathematics that deals with shapes, sizes, angles, and dimensions of objects. Explore 2D and 3D shapes, angles in geometry with examples!

"Three scientists, Ibn al-Haytham, Khayyam, and al-Tusi, had made the most considerable contribution to this branch of geometry whose importance came to be completely recognized only in the 19th century.

Geometry is all about shapes and their properties. If you like playing with objects, or like drawing, then geometry is for you!

Two types of geometry are plane geometry and solid geometry. Plane geometry deals with two-dimensional shapes and planes (x-axis and y-axis), while solid geometry deals with three-dimensional objects and 3D planes.