MathDB
find angle such that a triangle has the largest area, inside a right triangle

Source: Czech-Polish-Slovak Junior Match 2015, Individual p1 CPSJ

March 14, 2020
geometrymaxarea of a triangleangleright triangle

Problem Statement

In the right triangle ABCABC with shorter side ACAC the hypotenuse ABAB has length 1212. Denote TT its centroid and DD the feet of altitude from the vertex CC. Determine the size of its inner angle at the vertex BB for which the triangle DTCDTC has the greatest possible area.