Question

Aflat lungimea ipotenuzei unui triunghi dreptunghic isoscel cu aria de 100 cm patrati

Answer 1

 [tex]A_\Delta=\frac{cat._1\cdot{cat._2}}{2}=100cm^2\;adica:\;cateta^2=200\\ deci\;\; cat._1=cat._2=10\sqrt2\\ \Rightarrow\;\;ip.^2= 2\cdot(10\sqrt2)^2=400\;\rightarrow\;ip.=\sqrt{400}=20cm.[/tex]

Answer 2

Aria unui tr dr isoscel  S=c^2/2  100=c^2/2   c^2=200 c= 10√2cm
i^2=c^2+c^2=200+200=400   i=√40=20cm