Răspuns:
a) A= lxl= 24x24= 576 AB= BC=AC= CD=24
b) CF=[tex]\frac{25BC}{100} = \frac{BC}{4}[/tex]=24:4= 6 cm CF=6 cm
CF= BE= 6 cm
EC= BC- BE= 24-6= 18 cm
DE= [tex]\sqrt{CE^{2} +CD^{2} }[/tex]= [tex]\sqrt{324 +576 }[/tex]= [tex]\sqrt{900}[/tex]= 30 cm
c) DF= CD- CF= 24-6= 18 cm
