Răspuns :
P = 120 x2 + 80 x2 = 400cm²
b)A geam = 120x80 = 9600 cm²
A cu rama = 128 x 88 = 11264 cm²
A rama = Ageam - Acu rama = 1664 cm²
c)6 x 25 x 9600 = 1440000cm²= 144m²
b)A geam = 120x80 = 9600 cm²
A cu rama = 128 x 88 = 11264 cm²
A rama = Ageam - Acu rama = 1664 cm²
c)6 x 25 x 9600 = 1440000cm²= 144m²
a) Perimetru rama =(120+80)*2=200*2=400cm=4m
b)fereastra = rama+geam
Arie rama=Arie fereastra-Arie geam
Arie fereastra= 120*80=9600cm²=0.96m²
Arie geam = (120-8-8)*(80-8-8)=104*64=6656cm²
Arie rama=9600-6656=2944cm² =0.2944m²
c)25*6*6656=998400cm²=99.84m²
b)fereastra = rama+geam
Arie rama=Arie fereastra-Arie geam
Arie fereastra= 120*80=9600cm²=0.96m²
Arie geam = (120-8-8)*(80-8-8)=104*64=6656cm²
Arie rama=9600-6656=2944cm² =0.2944m²
c)25*6*6656=998400cm²=99.84m²