2
Part of 1979 Bundeswettbewerb Mathematik
Problems(2)
concurrent wanted, 2 squares related
Source: 2010 Saudi Arabia IMO TST II p2
12/27/2021
The squares and are situated in the same plane and are directly oriented. Prove that the lines , , and are concurrent.
geometryconcurrencyconcurrentSquaressquare
Bundeswettbewerb Mathematik 1979 Problem 2.2
Source: Bundeswettbewer Mathematik 1979 Round 2
9/23/2022
A circle with center and radius is given. Find the locus of the incenters of all obtuse-angled triangles inscribed in .
Locusgeometrycircleincenter