Răspunsuri

2014-06-09T14:41:34+03:00
Scrii aria in 2 moduri.
A =  \frac{AB AC}{2}  ⇒ 24 =  \frac{AB AC}{2}  ⇒ 
A =  \frac{BC AD}{2}  ⇒ 24 =  \frac{10 AD}{2}  ⇒ 24 = 5 · AD ⇒ AD =  \frac{24}{5} cm

Dupa care, te duci in prima relatie ⇒ 24 =  \frac{AB  \frac{24}{5} }{2}  ⇒ 48 =  \frac{24AB}{5}  ⇒ 24 · AB = 240 ⇒ AB= 10 cm

Iar apoi perimentrul : P = AB + BC + AC
P = 10 + 10+  \frac{24}{5}  ⇒ P =  \frac{100+96}{5}  ⇒ P =  \frac{196}{5}  cm