Question

ajutați maaaa ex 9...​

Answer 1

AB=54

CD=24

ABCD trapez dr ortodiagonal⇒ h=√B×b

AD=√54×24=√1296

AD=36 cm

$A=\frac{(B+b)\times h}{2}=\frac{78\times 36}{2} = 1404cm^2$