Răspuns:
AE = 9,6cm
Explicație pas cu pas:
[tex]P_{ABCD} = 40cm = 4*l[/tex]
⇒ l=10 cm
Aflam AE prin aria in doua moduri
Stim ca [tex]A_{romb} =\frac{d1*d2}{2} =l*h[/tex]
[tex]A_{ABCD} =\frac{12*16}{2} = 10*AE[/tex]
[tex]96cm^{2} = 10 * AE[/tex]
⇒ AE =[tex]\frac{96cm^{2} }{10cm}[/tex]
AE = 9,6cm
