Understanding these fundamental concepts lays the foundation for exploring more advanced topics in geometry. This lesson introduces these basic geometric elements with definitions, examples, and …

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

Dec 7, 2025 · This article covers all the basics of geometry, including points, lines, segments, rays, planes, and angles. You’ll also learn a bit about postulates, theorems, and proofs.

This video explains and demonstrates the fundamental concepts (undefined terms) of geometry: points, lines, ray, collinear, planes, and coplanar. The basic ideas in geometry and how we represent them …

Essential stuff for describing the world around you. 1. Lines and angles. 2. Related angles. What about angles bigger than 360 degrees? 3. Triangles. See if it's really true, and then prove it! They have two …

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 …

When you start studying geometry, it is important to know and understand some basic concepts. This page will help you understand the concept of dimensions in geometry, and work out whether you are …

Triangles are similar if they have the same shape, they may be of different sizes. Therefore, the triangle obtained by rotating a triangle is similar to the original triangle. Similarly, the mirror image or the …

This study guide summarizes basic geometric terms (point, line, plane), how to interpret and label geometric figures, and 5 basic postulates for points, lines, planes, and intersections.

In its simplest form, geometry is the mathematical study of shapes and space. Geometry can deal with flat, two-dimensional shapes, such as squares and circles, or three-dimensional shapes with depth, …