Question

In triunghiul dreptunghic abc,masura unghiului a egal cu 90 de grade ad perpendicular pe bc,d apartine bc..se da.a)cd=19,2cm si ac=24 cm..calculati bc,bd,ab
b) bd=12,6cm si bc =35 cm..Calculati cd,ab si ac!!URgent

Answer 1

a) Δ ABC dreptunghic
Teorema catetei⇒ AC²=DC*BC⇒ 24²=19,2 *BC⇒ 576= 19,2 *BC
BC= 576:19,2=30 cm
BD=30-19,2=10,8cm
T Pit ⇒ AB²=BC²-AC²= 900-576=324⇒ AB=18cm

b) CD=35-12,6= 22,4cm
AB² = BD*BC= 12,6 * 35=441
AB= 21 cm
AC²=BC²-AB²= 1225-441=784⇒ AC=28cm