Question

VĂ ROOOOOG.E GREUU.DAU COROANA

Answer 1

6. ABC triunghi
Ab= Ac=24 cm
P triunghiului 58 cm
------------------------------
BC=?
Deci faci un triunghi oarecare
Sa calculez
Ab+Ac=BC
24cm+24cm= de cm BC 50 - 48

Answer 2

5.
P=58
24+24+x=58 =>x=58-48=10 cm
6.
Semiperim. = P/2 = 3L/2 = 90 =>3L=180 =>L=60 mm
7.
(a-x+29+c+x)=P
a+29+c=P
8.
P=2n+2n+2+2n+4
P=6n+6
9.
MN=12 cm
NO=12+7=19 cm
MO=12×2=24 cm
P=55 cm
10.
P.patrat = 4×3=12 cm
P.tr.echilat.=3×L=12 =>L=4 cm
11.
a+b+c=108
b-a=5 =>b=a+5
c-b=20:4 =>c=b+5=a+5+5=a+10
a+a+5+a+10=108
3a=108-15
3a=93 =>a=31 =>b=36