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Va rogg am nevoie urgent ! Dau coroana ! Ex 9

Va Rogg Am Nevoie Urgent Dau Coroana Ex 9 class=

Răspuns :

9.
a)AOB - a
BOC - b
COA - c
a+b+c=360
2x+20+3x+10+4x+15=360
9x+45=360
9x=315
x=35
=>a=90
=>b=115
=>c=155
b)<BOM=<MOC=115/2=57grd 30'
<AON=<NOC=155/2=77grd 30'
=> <MON=125