<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>
5/14 < a/14 < 1
5/14 < a/14 < 14/14
a={6, 7, 8, 9,10, 11,12,13}
-19•(-х-у+z) = 19x+19y-19z
V=a*b*H
12 4/33=2 3/11*b*4
400/33=100/11*b
b=400/33÷100/11
b=4/3
b=1 1/3
Ответ:1 1/3см.