John Casey

John Casey
John Casey

John Casey was a respected Irish geometer. He is most famous for Casey's theorem on a circle that is tangent to four other circles, an extension of Ptolemy's theorem. However, he contributed several novel proofs and perspectives on Euclidean geometry. He and Émile Lemoine are considered to be the co-founders of the modern geometry of the circle and the triangle.

From *.wikipedia.org,
General Info
.
Male
Date of Birth
May 12nd, 1820
Age
206
Birth Place
Ireland, Munster, County Limerick
Date of Death
January 3rd, 1891
Died Aged
70
Star Sign
Taurus
Social Networks , Links
Interest
Loading Chart...
Lists
    index: 1x 0.030629873275757s
fmsppl-page-output: 1x 0.028311967849731s
t_/pages/fms-person-json: 1x 0.028290033340454s
t_/blocks/person-card-json: 1x 0.018580913543701s
headline: 8x 0.012186288833618s
t_/common/header: 1x 0.0090529918670654s
router_page: 1x 0.0018360614776611s
t_/common/head: 1x 0.00060606002807617s
head-facts: 1x 0.00057888031005859s
t_/common/footer: 1x 0.00038909912109375s
t_/common/searcher-result: 1x 1.5020370483398E-5s
----- END OF DUMP (2026-05-21 07:24:05)  -----