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Mathematics Dictionary

Elementary Geometry

Subjects

Symbol Defintion

Sqr(x) = square of x

GE 01 | - Angles

GE 02 | - Lines

GE 03 | - Triangles

GE 04 | - Circles

GE 05 | - Polygons

GE 06 | - Quadrilaterals

GE 07 | - Triangles : Rules and theories

GE 08 | - Circle : Rules and theory

GE 10 | - Locus of geometric diagrams

GE 11 | - Construction geometry

GE 14 | - Medians of triangle and centroid

GE 15 | - Ex-center and in-center

GE 16 | - Ortho-center of triangle

GE 17 | - Pedal triangle

GE 18 | - Ex-central triangle

GE 19 | - Nine points circle

GE 20 | - Geometry Index

GE 21 | - Diagrams in geometry

GE 22 | - Glossay

GE 23 | - Home Work

GE 24 | - References

GE 25 | - Examples link to program numbers n1 and n2

GE 26 | - Formulae in geometry

GE 27 | - Examples with solutions (QA)

Answers

GE 01. Angles

Text

Topic | Various names of angles

Diagrams

Topic | Diagrams of angles : Section 01

GE 02. Lines
Text

Topic | Lines

Diagrams

Topic | Diagrams of lines : section 02

GE 03. Triangles
Text

Topic | Triangles
Examples
- Various names of triangle
- Five centers
- Pedal triangle
- Ex-central triangle

Diagrams

Topic | Diagrams of Triangles : section 03

GE 04. Circle

Text

Topic |
Outlines

Diagrams

Topic | Diagrams of circle : section 4

GE 05. Polygons

Text

Topic | New

Diagrams

Topic | Diagrams of Polygons

GE 06. Quadrilaterals

Text

Topic | New

Diagrams

Topic | Diagrams of quadrilaterals

GE 07. Theory and rules of triangle

Tetx

Topic | Triangle : Theory and rule

Examples

Congruent of triangle
Similarity of triangle
Mid point theory of triangle

Diagrams

Topic | Diagrams related with theory of Triangles

GE 08. Circle : Rule and theory
Text

Topic | Circle : Rule and theory

Examples

Tangent and normal are perpendicular each other
Two tangents to a circle are equal

Topic |

Go to Begin

GE 10. Locus

Text

Topic | Locus

Example

Two points A and B are fixed. Moving point C keeps angle ACB same.
What is the locus

GE 11. Construction geometry

Topic | New

Topics : Examples

1. Draw parabolla using the definition of locus
2. Draw ellipse using the definition of locus
3. Draw triangle using 3 given medians

Topic | New

Topic | New
Examples

Topic | New

GE 15. Ex-center and in-center

Topic | - Ex-center and in-center

GE 16. Ortho-center

Topic | Ortho-center

GE 17. Pedal triangle

Topic | Pedal triangle
Topics
- Definition, proof and theory

GE 18. Ex-central triangle
Text

Topic | - Ex-central triangle
Topics
- 1. Definition, proof and theory
- 2. Prove that AF = s and s = (a+b+c)/2. AF is tangent to ex-circle

GE 19. Nine points circle

Text

Topic | - Nine points circle
Topics
- Definition, proof and theory

GE 20. Geometry Index

Topic | Geometry Index
How to find keyword ?
- Find the section number and topic number of keyword
- 1st number : Section number
- 2nd number : Topic number
- Remeber these two numbers
- Click Back to back subject page
- Click "Goto Begin" to top
- Click section number to enter the required section
- Click topic number

GE 21. Graphs in Geometry

Topic | Diagrams in geometry
Examples
- Program 03 02 : Five centers of triangle

GE 22. Glossary

Topic | Glossary of Geometry

GE 23. Home Work
By number sequence

Topic | Mathematics Home works
Selected Questions
- Algebra
- Analytic geometry
- Calculus
- Geometry
- Trigonometry

By Keyword in alphabetic order

Topic | Mathematics Home works
Selected Questions
- Algebra
- Analytic geometry
- Calculus
- Geometry
- Trigonometry

GE 24. References

Topic | References
Topics
- Mathematics on Internet
- Mathematics on PC Computer

GE 25. Examples link to program numbers n1 and n2

Topic | Examples link to program numbers n1 and n2
How to use ?
- 1. Find the question by keyword in alphabetic order
- 2. Remember the number n1 and n2
- 3. Click Back
- 4. Goto begin
- 5. Select lesson number n1 and enter new section n1
- 6. Select section number n2

GE 26. Formulae in geometry

Topic | Formulae in geometry

GE 27. Examples with solutions (QA)

Topic | Formulae in geometry

Q00. Tips

Index and examples

Lesson 20 : Index
Lesson 21 : Application graphic programs
Lesson 22 : Glossary
Lesson 23 : Goto home works
Lesson 24 : References
Lesson 25 : Examples link to section numbers, e.g. 03 02
Lesson 26 : Formulae in calculus
Lesson 27 : Select examples with solution (QA)

Highlight tops (Update later)

1. Five centers of a triangle in GE 03 03
2. Locus of geometrical problems in Lesson 10
3. Construction method in Lesson 11
4. Study of orthoo-center in Lesson 16
5. Pedal triangle in Lesson 17
6. Ex-central triangle in Lesson 18
7. Nine point circle in Lesson 19

Run Application graphic program (See Lesson 21)

Step 1 : Run at current location (no download)
Step 2 : Select Yes to run
Notes
- 1. The application program is only for internet use (Update monthly)
- 2. Download only available upto end of the month

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