Răspuns:
Explicație pas cu pas:
4.
AB/DF = AC/DE = BC/EF
3/2,25 = 4/3 = 5/3,75 = 1,(3)
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6.
a) x/3 = 60/y = 24/18
x/3 = 24/18
x = 3*24/18 = 4
60/y = 24/18
y = 60*18/24 = 45
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b) 4/5 = 10/x = 5√2/z = t/904
4/5 = 10/x
x = 5*10/4 = 25/2
4/5 = 5√2/z
z = 25√2/4
4/5 = t/904
t = 4*904/5 = 3616/5