Geometry

Geometry is all about shapes and their properties.

	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 three-dimensional space - the kind of space we live in ...

	Polyhedra : (they must have flat faces)	Platonic Solids Prisms Pyramids
	Non-Polyhedra: (if any surface is not flat)	Sphere Torus Cylinder Cone

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

Pentagon

Pentagram

Hexagon

Ellipse

Conic Sections

Set of all points

Using Drafting Tools Geometric Constructions Using the Protractor Using the Drafting Triangle and Ruler Using a Ruler and Compass

Transformations and Symmetry Transformations Index Symmetry Index Symmetry Artist Tessellation Artist

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