# Category:Lines

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This category contains results about **Lines**.

Definitions specific to this category can be found in Definitions/Lines.

In the words of Euclid:

(*The Elements*: Book $\text{I}$: Definition $2$)

This can be interpreted to mean that a line is a construct that has no thickness.

This mathematical abstraction can not of course be actualised in reality because however thin you make your line, it will have some finite width.

It can be considered as a continuous succession of points.

## Subcategories

This category has the following 11 subcategories, out of 11 total.

### B

- Broken Lines (empty)

### C

- Coplanar Lines (empty)
- Copunctal Lines (1 P)
- Curved Lines (empty)

### D

- Directed Lines (empty)

### I

- Infinite Half-Lines (empty)

### P

### S

### T

- Transversals (Geometry) (7 P)

## Pages in category "Lines"

The following 20 pages are in this category, out of 20 total.

### C

- Construction of Equal Straight Line
- Construction of Equal Straight Lines from Unequal
- Construction of Fourth Proportional Straight Line
- Construction of Mean Proportional
- Construction of Part of Line
- Construction of Perpendicular Line
- Construction of Perpendicular using Rusty Compass
- Construction of Similarly Cut Straight Line
- Construction of Third Proportional Straight Line