# Category:Euclidean Geometry

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This category contains results about **Euclidean Geometry**.

Definitions specific to this category can be found in **Definitions/Euclidean Geometry**.

**Euclidean geometry** is the branch of geometry in which the parallel postulate applies.

An assumption which is currently under question is whether or not ordinary space is itself **Euclidean**.

**Euclidean geometry** adheres to Euclid's postulates.

## Source of Name

This entry was named for Euclid.

## Subcategories

This category has the following 52 subcategories, out of 52 total.

### A

- Angle Bisector Vector (4 P)

### C

### D

- Decagons (3 P)
- Doubling the Cube (12 P)

### E

- Euclid Book II (14 P)
- Euclid Book III (37 P)
- Euclid Book IV (16 P)
- Euclid Book IX (38 P)
- Euclid Book V (30 P)
- Euclid Book VI (36 P)
- Euclid Book VII (48 P)
- Euclid Book VIII (29 P)
- Euclid Book X (134 P)
- Euclid Book XI (42 P)
- Euclid Book XII (25 P)
- Euclid Book XIII (23 P)
- Euclid Book XIV (11 P)

### G

- Glide Reflections (empty)
- Grassmann Coordinates (empty)

### H

### I

### L

### P

- Pappus's Hexagon Theorem (3 P)
- Parallel Planes (empty)
- Pentagons (14 P)
- Pentagrams (2 P)
- Point at Infinity (2 P)

### Q

### R

### T

- Tarski's Geometry (3 P)
- Trisecting the Angle (18 P)

### W

- Westwood's Puzzle (3 P)

## Pages in category "Euclidean Geometry"

The following 22 pages are in this category, out of 22 total.