# Heron's Formula and Ptolemy's Theorem

Formalized Mathematics (2008)

- Volume: 16, Issue: 2, page 97-101
- ISSN: 1426-2630

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topMarco Riccardi. "Heron's Formula and Ptolemy's Theorem." Formalized Mathematics 16.2 (2008): 97-101. <http://eudml.org/doc/267235>.

@article{MarcoRiccardi2008,

abstract = {The goal of this article is to formalize some theorems that are in the [17] on the web. These are elementary theorems included in every handbook of Euclidean geometry and trigonometry: the law of cosines, the Heron's formula, the isosceles triangle theorem, the intersecting chords theorem and the Ptolemy's theorem.MML identifier: EUCLID 6, version: 7.8.09 4.97.1001},

author = {Marco Riccardi},

journal = {Formalized Mathematics},

language = {eng},

number = {2},

pages = {97-101},

title = {Heron's Formula and Ptolemy's Theorem},

url = {http://eudml.org/doc/267235},

volume = {16},

year = {2008},

}

TY - JOUR

AU - Marco Riccardi

TI - Heron's Formula and Ptolemy's Theorem

JO - Formalized Mathematics

PY - 2008

VL - 16

IS - 2

SP - 97

EP - 101

AB - The goal of this article is to formalize some theorems that are in the [17] on the web. These are elementary theorems included in every handbook of Euclidean geometry and trigonometry: the law of cosines, the Heron's formula, the isosceles triangle theorem, the intersecting chords theorem and the Ptolemy's theorem.MML identifier: EUCLID 6, version: 7.8.09 4.97.1001

LA - eng

UR - http://eudml.org/doc/267235

ER -

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- Roland Coghetto, Circumcenter, Circumcircle and Centroid of a Triangle
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