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Geometry - Wikipedia
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.
Khan Academy | Khan Academy
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Geometry lessons - School Yourself
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 equal sides, but what about their angles? In triangles, sides and their opposite angles are related! 4. Triangle congruence and similarity.
Geometry | Definition, History, Basics, Branches, & Facts | Britannica
Geometry, the branch of mathematics concerned with the shape of individual objects, spatial relationships among various objects, and the properties of surrounding space.
Geometry - Math is Fun
Geometry is all about shapes and their properties. If you like playing with objects, or like drawing, then geometry is for you!
Geometry - Formulas, Examples | Plane and Solid Geometry - Cuemath
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.
Geometry - Math.net
Geometry is a branch of mathematics that includes the study of shape, size, and other properties of figures. It is one of the oldest branches of mathematics and may have been used even in prehistoric times.
Geometry (all content) - Khan Academy
Learn geometry—angles, shapes, transformations, proofs, and more.
Basic Geometry | Khan Academy
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.
High school geometry - Khan Academy
Learn high school geometry—transformations, congruence, similarity, trigonometry, analytic geometry, and more (aligned with Common Core standards).
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