Question

DAU COROANA LA PRIMUL RASPUNS EX.10,11,12 sau macar pe care le stiti

Answer 1

pr; 10. inΔABC m(∡A)=90° si m(∡B)=60°⇒m(∡C)=30°⇒conform th. ∡30°
AB=BC/2⇒BC=AB×2=12×2⇒BC=24cm
in ΔABC aplic th.pit.⇒AC²=BC²-AB²=24²-12²=576-144=432⇒AC=√432⇒
⇒AC=12√3cm
conform th. inaltimii⇒AD×BC=AC×AB⇒AD×24=12√3×12⇒AD=6√3cm

pr;11