Geometry
Geometry is all about shapes and their properties.
The two most common subjects are:

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 and pyramids). 
If you like playing with objects, or like drawing, geometry is for you!

Hint: Try drawing some of the shapes and angles as you learn ... it helps. 
Solids !
Solid Geometry is the geometry of threedimensional space  the kind of space we live in ...

Polyhedra :
(they must have flat faces) 





NonPolyhedra:
(if any surface is not flat) 

Also: Volume of a Cuboid
Plane Geometry
Plane Geometry is all about shapes on a flat surface (like on an endless piece of paper).
Here is a list of our pages related to plane geometry:
General
Plane
Geometric Symbols
Areas
Congruent
Pythagoras' Theorem
Pythagorean Triples
Quadrilaterals  Rhombus, Parallelogram,
etc
Right Angled Triangles
Shape
Similar
Triangles
Transversal
General Drawing
Polygons
Ellipse
Conic Sections
Set of all points
Using Drafting Tools (Ruler, Triangle, Compass)
Angles
Degrees (Angle)
Acute Angles
Right Angles
Obtuse Angles
Straight Angle
Reflex Angles
Parallel Lines and Pairs of Angles
Proof that a Triangle has 180°
Congruent Angles
Supplementary Angles
Complementary Angles
Angles Around a Point
Angles on a Straight Line
Interior Angles
Exterior Angles
Trigonometry
Introduction to Trigonometry
Trigonometry Index
