Question Number 174528 by Mastermind last updated on 03/Aug/22
Answered by behi834171 last updated on 05/Aug/22
$$\mathrm{4}\boldsymbol{{A}}=\frac{\boldsymbol{{a}}^{\mathrm{2}} \sqrt{\mathrm{3}}}{\mathrm{4}}\Rightarrow\boldsymbol{{A}}=\frac{\boldsymbol{{a}}^{\mathrm{2}} \sqrt{\mathrm{3}}}{\mathrm{16}}\:\:\:\:.\blacksquare \\ $$