Question

Решите задачу 8 класс Фото приклеплено

Answer 1

3.

$S=0,5*6*8*\sin 30=0,5*48*0,5=12\\\\2.\\\\\sin(AOC)=2S_{AOC}:(AO*OC)=\frac{28}{120}=\frac{7}{30}.\\ \\S_{BOD}=0,5*6^2 *\frac{7}{30} =\frac{21}{5}$