Răspuns :
a, b, c - unghiurile
a+b+c=360
b=10+2c
a=b-c=> a=10+2c-c=> a=10+c
10+c+10+2c+c=360
20+4c=360
4c=340
c=85
b=10+2*85
b=10+170
b=180
a=10+85
a=95
a+b+c=360
b=10+2c
a=b-c=> a=10+2c-c=> a=10+c
10+c+10+2c+c=360
20+4c=360
4c=340
c=85
b=10+2*85
b=10+170
b=180
a=10+85
a=95
a+b+c=360
b=10+2c
a=b-c
a+10+2c+c=360
b-c+10+2c+c=360
b-c+10+3c=360
10+2c-c+10+3c=360
10+c+10+3c=360
20+4c=360
4c=360-20
4c=340
c=340/4
c=85
b=10+2c
b=10+2 ori 85
b=10+170=180
a=b-c=180-85=95
a,b,c sunt unghiuri
b=10+2c
a=b-c
a+10+2c+c=360
b-c+10+2c+c=360
b-c+10+3c=360
10+2c-c+10+3c=360
10+c+10+3c=360
20+4c=360
4c=360-20
4c=340
c=340/4
c=85
b=10+2c
b=10+2 ori 85
b=10+170=180
a=b-c=180-85=95
a,b,c sunt unghiuri