Răspuns:
Explicație pas cu pas:
a+b =90°
a/b =0.2(4)/0.4(2)
0.2(4) =(24-2)/90 =22/90
0.4(2) =(42-4)/90 =38/90
a/b =22/90×90/38 =11/19 ⇒ a =11b/19
11b/19 + b =90° numitor 19
11b+19b =1710
30b=1710
b=57°
a=90-b =90-57 =33° ( sau: a=11b/19 =11*57/19 =33°)
