3 разрезали на *3=9
оставшиеся 6+9=15 листов
а) 5/32 в) 8/15 д) 6 ж) 1/36 б)1/21 г) 4/9 е) 1/6 з) 9/16
<span> 60 градусов-1/3
<span>120 градусов-2/3
<span>150 градусов-5/18
<span>45 градусов-1/4</span></span></span></span>
<span><span><span><span><span>80 градусов-4/9</span></span></span></span></span>
<span><span><span><span><span><span>12 градусов-1/15</span></span></span></span></span></span>
<span><span><span><span><span><span><span>15 градусов-1/12</span></span></span></span></span></span></span>
<span><span><span><span><span><span><span><span>18 градусов-1/10 </span></span></span></span></span></span></span></span>36 градусов-1/5
<span><span><span><span><span><span><span><span><span><span>20 градусов-1/9</span></span></span></span></span></span></span></span></span></span>
Y-80=7200:10
y-80=720
y=720+80
y=800
800-80=7200:10 (720)