NOTA:In figuri exista unghiuri opuse la varf. O sa cred ca deja stii regula lor.
a)2x+x+2x+x=360
6x=360
x=60
2x=120
c)x+x+80+x+x+80=360
4x+160=360
4x=200
x=50
x+80=130
b)4x+x+4x+x=360
10x=360
x=36
4x=144
d)x+3x+20+x+3x+20=360
8x+40=360
8x=320
x=40
3x+20=140
