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calculati aria unui trapez stiind ca B= 60 si h=24 cm

Răspuns :

a=h(B+b)/2
ae=24 
b=60
ctgb=be/ae
√3/3=be/24
be=24√3/3
be=8√3
consideram trapezul isoscel 
ae=df=8√3
aefd=patrat=>l=8√3 
bc=2*8√3+24=16√3+24
a=24(16√3+24+24)/2
a=12(16√3+48)
a=192√3+576