Question

Va rog frumos ex 2 si 3 .Daca se poate raspunsul complect pe foaie .

Answer 1

2.
A(ABCD)=(3+5)*4/2=16 cm²
2x+x=4
x=4/3
A(CBP)=(8/3 *3 )/2=4 cm²
A(PAD)=(4/3 *3 )/2=2 cm²
Acolorata=16-(4+2)=10 cm²


2.
r=3/2=1,5
Acerc =πr² = 2,25π≈7,065
S=√p(p-a)(p-b)(p-c)
p=(6+9+12)/2=27/2
S=√27/2(27/2-6)(27/2-9)(27/2-12)=√10935/16=27√15/4≈26,142
Acolorata= 26,142-7,065=19,077 cm²