Help on query formulation
An extremal problem and some relations characterizing acute triangles. (Jedan problem o ekstremu i neke relacije koje karakteriziraju šiljastokutan trokut.) (Croatian)
Mat.-Fiz. List 51, No. 203, 141-147 (2000-2001).
The author solves the problem of finding a maximal-area triangle whose vertices lie at three given concentric circles.
Reviewer: Dragan Blagojević (Beograd)
Classification: G43 G44 N64
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