Geometry is all about shapes and their properties.
If you like playing with objects, or like drawing, then geometry is for you!Geometry can be divided into:
|Plane Geometry is about flat shapes like lines, circles and triangles ... shapes that can be drawn on a piece of paper|
|Solid Geometry is about three dimensional objects like cubes, prisms, cylinders and spheres.|
|Hint: Try drawing some of the shapes and angles as you learn ... it helps.|
Point, Line, Plane and Solid
Plane Geometry is all about shapes on a flat surface (like on an endless piece of paper).
A Polygon is a 2-dimensional shape made of straight lines. Triangles and Rectangles are polygons.
Here are some more:
|Properties of Regular Polygons|
|Diagonals of Polygons|
|Circle Sector and Segment|
|Circle Area by Sectors|
|(Advanced) Circle Theorems|
There are many special symbols used in Geometry. Here is a short reference for you:
Congruent and Similar
Using Drafting Tools
Transformations and Symmetry
|Activity: Symmetry of Shapes
Activity: Make a Mandala
Activity: Coloring (The Four Color Theorem)
|Interactive Cartesian Coordinates|
|Hit the Coordinate Game|
More Advanced Topics in Plane Geometry
|Set of all points|
Trigonometry is a special subject of its own, so you might like to visit:
Solid Geometry is the geometry of three-dimensional space - the kind of space we live in ...
... let us start with some of the simplest shapes:
Polyhedra and Non-Polyhedra
There are two main types of solids, "Polyhedra", and "Non-Polyhedra":
(they must have flat faces)
(if any surface is not flat)
|Vertices, Faces, and Edges|