Question

va rog e urgent dau coroana ​

Answer 1

Răspuns:

Explicație pas cu pas:

Abcd patrat=> ab= cd=ad=bc= 2 rad 2

In triunghiul dab: m(<d)=90 grade

Teorema lui pitagora

Ad^2+ ab^2=Db^2

(2 rad3)^2+ (2 rad 3)^2= db^2

12+12=db^2

24= db^2=> db= rad 24=> db= 2 rad 6

Daca db= 2 rad 6 si dbfe patrat=> aria dbfe= db^2=> aria dbfe= (2 rad 6)^2= > aria dbfe= 24

Aria abcd= ab^2=> aria abcd= (2 rad3)^2=> aria abcd= 12

Daca aria abcd=12 si aria dbfe=24=> aria abcd= 2 ori aria dbfe

b) ab=a=> aria abcd=a^2

Ab= Db^2=a^2+a^2=> db^2= 2a^2=> db= radical din 2a^2=> db= a rad2

Aria dbfe= (a rad 2)^2=> aria dbfe= 2a^2

Daca aria abcd=a^2 si aria dbfe=2 a^2=> aria abcd= 2 ori aria dbfe

Cum lauturile unei figuri geometrice nu pot lua valori negative=> pentru orice a€R+ aria abcd= 2 aria dbfe