New answers tagged plane-geometry
3 votes
Definition of area
Very nice and deep question. I have thought a lot about it and only now can write a reasonable answer (with proper references). The basic conceptual idea is that area is a property of triangles in ...
- 44.3k
1 vote
Accepted
Two sets of circles each coaxal when the other Is
Invertinf at $O$, we reach the following claim. Let $\omega$ be the uncurcle of a triangle $A^*B^*C^*$, and let $A'$, $B'$, $C'$ be the tangency points of $\omega$ with the corresponding sides. Take ...
- 25.1k
Top 50 recent answers are included