Question

AJUTOR!!!sunt 30 de puncte

Answer 1

notam h=AD=x
triunghiul ADC isoscel deci AD=DC = x
sin 30=1/2
AB=2AD=2x
DB=√(2x)²-x²=√3x²=x√3
P=2x+x√2+x√3+x=4(3+√2+√3)
x(3+√2+√3)=4(3+√2+√3)
AD=x=4
BC=x√3+x=4√3+4
A=(4√3+4)×4/2=8√3+8