Question

Плиз срочно надо две задачи ​

Answer 1

$1. AC^2=AB^2+CB^2\\CB=\sqrt{AC^2-AB^2}=\sqrt{144-100}=\sqrt{44}=2\sqrt{11}\\\\2.\;\sin\angle A=\frac{CB}{AC}\\\frac6{AC}=\frac12\\AC=12$