Question

In triunghiul ABC avem m(<A)=90 grade ,m(<B)=30 si AD _|_ CB.
Calculati măsura lui CD si a lui DB,stiind ca CB are 40 cm

Answer 1

daca BC =40 cm ,AC=BC/2=20 cm⇒AB²=BC²-AC² ⇒AB²=40²-20²=1200
AB=√1200=20√3 cm

CD=x; DB=40-x
AC²=BC*CD ⇒20²=40x⇒400=40x⇒x=10 cm
DB=40-10=30 cm