Решение смотри на фотографии
π= 180°
0,8π = 0,8*180° = 144°
<span>2/3</span>π<span> = 2*180</span>°/3 = 120°<span>
</span>π<span>/12 = 180</span>°/12 = 15°<span>
7</span>π = 7*180° = 1260°<span>
5/</span><span>2 </span>π<span> = 5*180</span>°/2 = 450°<span>
0,75</span>π = 0,75*180° = 135°