Question

2) a,b.c daca ma poate ajuta cineva​

Answer 1

$a)c_1=8 cm\\ c_2=1,2dm=12cm\\ A=\frac{ip*h}{2} \\T.P: ip^{2} =c_1^{2} +c_2^{2} \\ ip^{2} =8^2+12^2=64+144=208\\ip=\sqrt{208} =\sqrt{2^{4}*13 } =4\sqrt{13} cm\\h=\frac{c_1*c_2}{ip} =\frac{8*12}{4\sqrt{13} } =\frac{96}{4\sqrt{13} } \\h=\frac{4\sqrt{6} }{4\sqrt{13} } =\sqrt{\frac{6}{13} } \\A=\frac{4\sqrt{13} *\sqrt{\frac{6}{13} } }{2} =2\sqrt{13} *\sqrt{\frac{6}{13} }\\=\frac{2\sqrt{13}}{1} *\sqrt{\frac{6}{13} }=2\sqrt{6} cm^2$