Plane Geometry

If you like drawing, then geometry is for you!

plane Plane Geometry is about flat shapes like lines, circles and triangles ... shapes that can be drawn on a piece of paper

Hint: Try drawing some of the shapes and angles as you learn ... it helps.

 

dimensions

Point, Line, Plane and Solid

A Point has no dimensions, only position
A Line is one-dimensional
A Plane is two dimensional (2D)
A Solid is three-dimensional (3D)

Plane Geometry is all about shapes on a flat surface (like on an endless piece of paper).

 




Polygons

A Polygon is a 2-dimensional shape made of straight lines. Triangles and Rectangles are polygons.

Here are some more:

Pentagon Pentagon
Pentagram Pentagram
Hexagon Hexagon

 

 

The Circle

Circle Theorems (Advanced Topic)

 

Symbols

There are many special symbols used in Geometry. Here is a short reference for you:

Geometric Symbols

 

Congruent and Similar

 

Angles

angles
Types of Angles

 

Compass  

Using Drafting Tools

 

Transformations and Symmetry

Transformations:

symmetry drawing

Symmetry:



 

Coordinates

interactive-cartesian-coordinates

 

 

More Advanced Topics in Plane Geometry

Pythagoras

abc triangle

 

Conic Sections

 

Trigonometry

Right-Angled Triangle

Trigonometry is a special subject of its own, so you might like to visit: