Răspuns:
Explicație pas cu pas:
<D + <E + <F + <G = 360°
D + 60%<D + 80%<D + 30%<D = 360°
100%<D + 60%<D + 80%<D + 30%<D = 360°
270%<D = 360°
270*<D/100 = 360°
<D = 100*360°/270 = 400°/3
400° : 3 = 399°60' : 3 = 133°20'
<D = 133°20'
<E = 400°/3*60/100 = 80°
<F = 400°/3*80/100 = 320°/3
320° : 3 = 318°120' : 3 = 106°40'
<F = 106°40'
<G = 400°/3*30/100 = 40°
