Question

ajutor e urgent
dau coroana ​

Answer 1

${bc}^{2} = {ab}^{2} + {ac}^{2}$

${4}^{2} = {ab}^{2} + {3}^{2 }$

$ab {}^{2} = {4}^{2} - {3}^{2}$

$ab ^{2} = 16 + 9$

${ab}^{2} = 25$

$ab = 5$

a. ABDE=patrat=>A=5•5

A=25cm pătrați

b. ABDE=patrat=>BD=AB=5cm