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Mathematics
Stelios Petrolekas's user avatar
Stelios Petrolekas's user avatar
Stelios Petrolekas's user avatar
Stelios Petrolekas
  • Member for 1 year, 3 months
  • Last seen this week
  • Greece
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937
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16
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About

I am a retired mathematician interested in Geometry

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Top posts

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17
Area of the fourth equilateral triangle inside a square: more elegant solution?
Mar 4
5
Isosceles trapezoid and rhombus from angle bisectors in a square
Dec 27, 2025
5
Orthocenter in obtuse triangle from square and equilateral triangle configuration
Jan 1
4
Perpendicular from vertex in square - angle problem
Dec 11, 2025
4
minimal length of two segments
Apr 15
3
Prove that triangle CHL is isosceles in rectangle with specific construction
Nov 16, 2025
3
Properties of incenter and angle bisectors in a square
Dec 21, 2025
3
Isosceles trapezoid and rhombus from angle bisectors in a square
Dec 27, 2025
3
Orthocenter in obtuse triangle from square and equilateral triangle configuration
Jan 1
2
Perpendiculars passing through diagonal intersection in a quadrilateral formed within a square
Nov 23, 2025