Răspunsuri

2014-05-08T17:09:12+03:00
In ΔABD masura (D) = 90 grade ⇒ BD² = AB² - AD² ⇒ BD = √ 225 - 144⇒ BD = √81 ⇒ BD = 9
In ΔABC masura (A)=90 grade ⇒ AD = √BD·BC ⇒ 15=√9·DC⇒15²=9·DC⇒DC=225:9⇒ DC=25 ⇒BC = 34 cm
In ΔABC masura (A)=90 grade⇒ AC²= BC² - AM²⇒ AC²= 1156-225⇒ AC=7√19 cm
Sper ca ti-am putut fi de ajutor :))