Răspuns:
Notam <QON cu x
>POM = x/2
>POQ = 90 grade
POQ + POM + QON = 180 grade
90 + x + x/2 = 180 grade
90 + 3x/2 = 180 grade
3/2 x = 180 - 90
1,5x = 90
x = 90/15/10
x = 90/15 * 10/1
x = 6 * 10/1
x = 60
> QON = 60 grade
> POM = 30 grade
>POQ = 90 grade