Converging points

Problem by zainul abidin
30 Nov 1999 00:00 WIB1 answer

Three points are located at the vertices of an equilateral triangle whose side equals $a$. They are start moving simultaneously with velocity $v$ constant in modulus, with the first point heading continually for the second, the second for the third, and the third for the first. How soon will the point converge?