Odpowiedzi

2010-03-24T14:48:19+01:00
A) objętość a*b*c

2cm
1dm = 10 cm
5 mm = o,5 cm
V= 10cm *2cm * 0,5cm = 10 cm ³

Pc = 2ac + 2bc + 2ab - pole powierzchni prostopadłościanu

a 2cm
b 1dm = 10 cm
c 5 mm = o,5 cm

Pc = (2*2cm*0,5cm)+(2*10cm*0,5cm)+(2*2cm*10cm) = 2cm ² + 10 cm ² + 40 cm ² = 52 cm ²

b) V = a³

V= 1,2cm*1,2 cm * 1,2 cm =1,728 cm³

Pc = 6*a²

6* (1,2cm*1,2cm) = 6*1,44 cm²= 8,64 cm²
2010-03-24T14:54:20+01:00
A. V=a*b*h
V=20mm*100mm*5mm
V=10000mm³

P= 2ab+2bh+2ah
p=2*20*100+2*100*5+2*20*5
p=4000+1000+200
P=5200mm₂

B. V= a³
V=12mm³
V=1728mm³

P=6a²
P=6*12mm²
P=6*144mm²
P=864mm²