Skip to main content
Tour
About Us
Meta
current community
Stack Exchange
chat
Meta Stack Exchange
your communities
Sign up
or
log in
to customize your list.
more stack exchange communities
company blog
Log in
Stack Exchange
All Sites
Top 400 Users
Digests
Stelios Petrolekas
I am a retired mathematician interested in Euclidean Geometry
top
accounts
reputation
activity
subscriptions
Top Questions
5
votes
Isosceles trapezoid and rhombus from angle bisectors in a square
geometry
trigonometry
euclidean-geometry
analytic-geometry
transformation
asked Dec 27, 2025 at 10:51
math.stackexchange.com
5
votes
Orthocenter in obtuse triangle from square and equilateral triangle configuration
geometry
vectors
euclidean-geometry
analytic-geometry
transformation
asked Jan 1 at 12:40
math.stackexchange.com
Top Answers
17
Area of the fourth equilateral triangle inside a square: more elegant solution?
math.stackexchange.com
math.stackexchange.com