  During the last three decades the determination of the Unitarity Triangle
(UT) was dominated by the measurements of its sides $R_b$ and $R_t$ through
tree-level $B$ decays and the $\Delta M_d/\Delta M_s$ ratio, respectively, with
some participation of the measurements of the angle $\beta$ through the mixing
induced CP-asymmetries like $S_{\psi K_S}$ and $\varepsilon_K$. However, as
pointed out already in 2002 by Fabrizio Parodi, Achille Stocchi and the present
author, the most efficient strategy for a precise determination of the apex of
the UT, that is $(\bar\varrho,\bar\eta)$, is to use the measurements of the
angles $\beta$ and $\gamma$. The second best strategy would be the measurements
of $R_b$ and $\gamma$. However, in view of the tensions between different
determinations of $|V_{ub}|$ and $|V_{cb}|$, that enter $R_b$, the
$(\beta,\gamma)$ strategy should be a clear winner once LHCb and Belle II will
improve the measurements of these two angles. In this note we recall our
finding of 2002 which should be finally realized in this decade through precise
measurements of both angles by these collaborations. In this context we present
two very simple formulae for $\bar\varrho$ and $\bar\eta$ in terms of $\beta$
and $\gamma$ which could be derived by high-school students, but to my
knowledge never appeared in the literature on the UT, not even in our 2002
paper. We also emphasize the importance of precise measurements of both angles
that would allow to perform powerful tests of the SM through numerous
$|V_{cb}|$-independent correlations between $K$ and $B$ decay branching ratios
$R_i(\beta,\gamma)$ recently derived by Elena Venturini and the present author.
The simple findings presented here will appear in a subsection of a much longer
contribution to the proceedings of KM50 later this year. I exhibited them here
so that they are not lost in the latter.
