# 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 47 subcategories, out of 47 total.

### A

- Angle Bisector Vector (4 P)

### C

### D

- Decagons (3 P)
- Doubling the Cube (11 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

### H

### L

### P

- Parallel Planes (empty)
- Pentagons (13 P)
- Pentagrams (2 P)
- Point at Infinity (1 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.