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Cyclic quadrilateral
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Mathematics
Area of mathematics
Geometry and topology
Euclidean geometry
Created
2026-09-24
Updated
2026-10-14
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A
cyclic quadrilateral
has all four
vertices
on one
circle
. Among
quadrilaterals
with fixed cyclically ordered side
lengths
,
a
cyclic quadrilateral
has maximal
area
.
Table of contents
Brahmagupta's formula
Cyclic quadrilateral
Brahmagupta's formula
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Cyclic quadrilateral
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Euclidean geometry
Geometry and topology
Area of mathematics
Mathematics
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Past exam of the mathematics course of the University of Cambridge
/
2022
/
ii
/
Paper 4
/
25I
/
b
/
Solution
Past exam of the metric spaces and complex analysis course of the University of Oxford
/
2015
/
6
/
c
/
Solution
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