Question

5 unghiuri in jurul unui punct au masurile exprimate prin numere consecutive .calculati masurile unghiurilor

Answer 1

Fie a, b, c, d, e unghiurile
a+b+c+d+e=360°
b=a+1
c=b+1=a+2
d=c+1=b+2=a+3
e=d+1=c+2=b+3=a+4
=>a+a+1+a+2+a+3+a+4=360
5a+10=360
5a=350
a=70°
b=71°
c=72°
d=73°
e=74°