K-12 – Geometry

Geometry is the branch of mathematics that deals with shapes, angles, dimensions and sizes of a variety of things we see in everyday life. Geometry is derived from Ancient Greek words – ‘Geo’ means ‘Earth’ and ‘metron’ means ‘measurement’. In Euclidean geometry, there are two-dimensional shapes and three-dimensional shapes.  In a plane geometry, 2d shapes such as triangles, squares, rectangles, circles are also called flat shapes. In solid geometry, 3d shapes such as a cube, cuboid, cone, etc., are also called solids. The basic geometry is based on points, lines and planes explained in coordinate geometry. [1]

Plane Geometry

• Points
• Lines
• Angle
• Polygon
• Circle

Solid Geometry

• Edges
• Faces
• Vertices

References

[1] “What Is Geometry? Plane & Solid Geometry: Formulas & Examples.” 2023. BYJUS. BYJU’S. https://byjus.com/maths/geometry/.

Additional Reading

Roberts, Donna and Frederick Roberts. 2023. “Geometry Lessons and Practice.” MathBitsNotebook. Accessed November 23. https://mathbitsnotebook.com/Geometry/Geometry.html.

“Geometry.” 2023. Mathematics LibreTexts. October 1. https://math.libretexts.org/Bookshelves/Geometry.

“Geometry.” 2023. Math Is Fun. Accessed November 23. https://www.mathsisfun.com/geometry/.

“Introduction to Geometry: Points, Lines, Planes and Dimensions.” 2023. SkillsYouNeed. Accessed November 23. https://www.skillsyouneed.com/num/geometry.html.

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