# Category:Triangle geometry

Here is a list of articles in the category **Triangle geometry** of the Computing portal that unifies foundations of mathematics and computations using computers.

## Subcategories

This category has the following 3 subcategories, out of 3 total.

### T

## Pages in category "Triangle geometry"

The following 123 pages are in this category, out of 123 total.

### 5

- 5-Con triangles
*(computing)*

### A

- AA postulate
*(computing)* - Acute and obtuse triangles
*(computing)* - Ailles rectangle
*(computing)* - Altitude (triangle)
*(computing)* - Angle bisector theorem
*(computing)* - Apex (geometry)
*(computing)* - Apollonius's theorem
*(computing)* - Automedian triangle
*(computing)*

### B

- Barrow's inequality
*(computing)* - Barycentric coordinate system
*(computing)* - Base (geometry)
*(computing)* - Brocard circle
*(computing)* - Brocard points
*(computing)*

### C

- Carnot's theorem
*(computing)* - Carnot's theorem (conics)
*(computing)* - Carnot's theorem (inradius, circumradius)
*(computing)* - Carnot's theorem (perpendiculars)
*(computing)* - Cathetus
*(computing)* - Central line (geometry)
*(computing)* - Ceva's theorem
*(computing)* - Cevian
*(computing)* - Circumgon
*(computing)* - Circumscribed circle
*(computing)* - Cleaver (geometry)
*(computing)* - Congruent number
*(computing)* - Conway triangle notation
*(computing)*

### E

- Eisenstein triple
*(computing)* - Equilateral triangle
*(computing)* - Erdős–Mordell inequality
*(computing)* - Euler line
*(computing)* - Euler's theorem in geometry
*(computing)* - Exsymmedian
*(computing)* - Extended side
*(computing)* - Exterior angle theorem
*(computing)* - Extouch triangle
*(computing)*

### F

- Fagnano's problem
*(computing)* - Fuhrmann circle
*(computing)* - Fuhrmann triangle
*(computing)*

### G

- Geometric mean theorem
*(computing)* - GEOS circle
*(computing)*

### H

- Hadwiger–Finsler inequality
*(computing)* - Harcourt's theorem
*(computing)* - Heilbronn triangle problem
*(computing)* - Heron's formula
*(computing)* - Hinge theorem
*(computing)* - Hypotenuse
*(computing)*

### I

- Ideal triangle
*(computing)* - Incircle and excircles of a triangle
*(computing)* - Inellipse
*(computing)* - List of triangle inequalities
*(computing)* - Isogonal conjugate
*(computing)* - Isosceles triangle
*(computing)* - Isotomic conjugate
*(computing)*

### J

- Jacobi's theorem (geometry)
*(computing)* - Johnson circles
*(computing)*

### K

- Kosnita's theorem
*(computing)*

### L

- Langley's Adventitious Angles
*(computing)* - Langley’s Adventitious Angles
*(computing)* - Law of cosines
*(computing)* - Law of sines
*(computing)* - Lemoine's problem
*(computing)* - Lester's theorem
*(computing)* - List of triangle topics
*(computing)*

### M

- Malfatti circles
*(computing)* - Mandart inellipse
*(computing)* - Marching triangles
*(computing)* - Marden's theorem
*(computing)* - Mass point geometry
*(computing)* - Maxwell's theorem (geometry)
*(computing)* - Medial triangle
*(computing)* - Median (geometry)
*(computing)* - Median triangle
*(computing)* - Menelaus's theorem
*(computing)* - Mollweide's formula
*(computing)* - Morley's trisector theorem
*(computing)* - Musselman's theorem
*(computing)*

### N

- Napoleon's theorem
*(computing)* - Nine-point circle
*(computing)* - Nine-point hyperbola
*(computing)*

### O

- One-seventh area triangle
*(computing)* - Ono's inequality
*(computing)* - Orthocentric system
*(computing)* - Orthocentroidal circle
*(computing)* - Orthopole
*(computing)*

### P

- Pappus's area theorem
*(computing)* - Pedal triangle
*(computing)* - Pedoe's inequality
*(computing)* - Perspective (geometry)
*(computing)* - Polar circle (geometry)
*(computing)* - Pompeiu's theorem
*(computing)* - Pythagorean theorem
*(computing)* - Pythagorean triple
*(computing)*

### R

- Reuschle's theorem
*(computing)* - Right triangle
*(computing)* - Routh's theorem
*(computing)*

### S

- Saccheri–Legendre theorem
*(computing)* - Semiperimeter
*(computing)* - Similarity (geometry)
*(computing)* - Simson line
*(computing)* - Solution of triangles
*(computing)* - Spieker circle
*(computing)* - Splitter (geometry)
*(computing)* - Steiner ellipse
*(computing)* - Steiner inellipse
*(computing)* - Steiner–Lehmus theorem
*(computing)* - Stewart's theorem
*(computing)* - Sum of angles of a triangle
*(computing)* - Sylvester's triangle problem
*(computing)* - Symmedian
*(computing)*

### T

- Tangential triangle
*(computing)* - Thales's theorem
*(computing)* - Thomsen's theorem
*(computing)* - Thomson cubic
*(computing)* - Triangle
*(computing)* - Triangle center
*(computing)* - Triangle strip
*(computing)* - Triangular coordinates
*(computing)* - Trilinear coordinates
*(computing)* - Trilinear polarity
*(computing)* - Trillium theorem
*(computing)*

### V

- Viviani's theorem
*(computing)*

### W

- Weitzenböck's inequality
*(computing)*