# Category:Euclid Book IV

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These proofs can all be found in Book $\text {IV}$ of Euclid's *The Elements*.

The specific form of these has been adapted from Sir Thomas L. Heath's *Euclid: The Thirteen Books of The Elements: Volume 2, 2nd ed.*

## Pages in category "Euclid Book IV"

The following 16 pages are in this category, out of 16 total.

### C

- Circumscribing about Circle Triangle Equiangular with Given
- Circumscribing Circle about Regular Pentagon
- Circumscribing Circle about Square
- Circumscribing Circle about Triangle
- Circumscribing Regular Pentagon about Circle
- Circumscribing Square about Circle
- Construction of Isosceles Triangle whose Base Angle is Twice Apex