A cura di: Antonio Bernardo


geo-1556.png$2p(ABC)=96cm$

$bar{AC}=bar{BC}=2/3 bar{AB} +20cm$

pongo $bar{AB}=x$

$bar{AC}=2/3 x +20cm$

Il perimetro $x+2(2/3 x+20)=96cm$

$x+4/3 x +40=96$

$3x+4x+120=288$

$7x=168$

$x=168/7=24cm$