Question

triunghiul ABC este dreptunghic in A.daca AB\AC=1\2 si AB+AC=9 cm, calculati aria triunghiului ABC urgenttttt va roog :-) :-)

Answer 1

$\frac{AB}{AC}= \frac{1}{2} => \left \{ {{AB=1k} \atop {AC=2k}} \right.$
AB+BC=9cm.
=>1k+2k=9
    3k = 9
    k=3. 
 =>$\left \{ {{AB=1cm} \atop {AC=6cm}} \right.$
Aria = $\frac{1*6}{2} = 3cm ^{2}$