Question

rapid va ROG dau coroana!!

Answer 1

Avem triunghi dreptungic. Calculam AC

AC²=BC²-AB²

AC²=10²-5²

AC²=100-25

AC²=75

AC=√75

AC=5√3

ctg(∡C)=cateta alaturata/cateta opusa

ctg(∡C)=$\frac{5\sqrt{3} }{5}$

Se simplifica 5 cu 5

ctg(∡C)=√3⇒ ∡C=30°