P=2πR
R=P:2π=8,96:2π=1,43mm
Пошаговое объяснение:
1) <BAD=56°+38°=94°
2)=112°+75°=187°
<span>х(х+4)=12</span>
<span>х*х+4х=12</span>
<span>2х+4х=12</span>
<span>6х=12</span>
<span>х=12:6</span>
x=2