Răspuns :
[tex] \dfrac{AB}{0,(3)}=\dfrac{BC}{0,25}\Rightarrow\dfrac{AB}{ \dfrac{1}{3} }=\dfrac{BC}{ \dfrac{1}{4} }\Rightarrow3AB=4BC\RightarrowAB=\frac{4}{3}BC[/tex]
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AB·BC=108⇒4/3·BC²=108⇒BC²=81⇒BC=9 cm⇒AB=(4/3)·9=12 cm.
Scriem acum aria
AB·BC=108⇒4/3·BC²=108⇒BC²=81⇒BC=9 cm⇒AB=(4/3)·9=12 cm.
A=l*L=108
A=AB*BC
AB BC dp cu 3/9=1/3 si 25/100
AB supra 1/3=Bc supra 1/4=k
AB=k/3 si BC=k/4 si inlocuim in formula ariei
108=k/3*k/4
k la a2a supra 12=108
k la a2a=12*108
k la a2a=1296
k=v1296 v-radical
k=36
AB-k/3=36/3=12
BC-k/4=36/4=9