Răspuns :
Fie x, masura unghiului cautat
(90-x)=(180-x):10
90-x=18-x/10
90-18=x-x/10
72=9x/10
8=x/10
x/10=8
x=80°
verificare...complementul are 10° si suplementul are 100°, adevarat , bine rezolvat
as simple as that!
(90-x)=(180-x):10
90-x=18-x/10
90-18=x-x/10
72=9x/10
8=x/10
x/10=8
x=80°
verificare...complementul are 10° si suplementul are 100°, adevarat , bine rezolvat
as simple as that!
10÷100×(180-x)=90-x
1800-10x=9000-100x
100x-10x=7200
90x=7200
x=7200÷90
x=80
1800-10x=9000-100x
100x-10x=7200
90x=7200
x=7200÷90
x=80