Question

Oblicz objętość i pole powieszchni:
a)Prostopadłościanu o wymiarach 2cm x 1dm x 5mm
b)Sześcianu o krawędzi 1,2cm


Pilne na jutro !!
Z góry dzięki!! ;P

Answer 1

A)
1dm=10cm
5mm=0.5cm

V=2*10*0.5=10cm(3)

Pp=2*10=20cm(2)

Ppb=2*(2*0.5)+2*(10*0.5)=2+10=12cm(2)

Pc=2*20+12=52cm(2)

b)
V=1.2*1.2*1.2=1.728cm(3)

Pc=1.2*1.2*6=8.64cm(2)

Answer 2

A)
a = 2cm
b = 1dm = 10 cm
H = 5mm = 0,5 cm

Pp = 2*10 = 20
Pb = 2*2*0,5 + 2*10*0,5 = 2+10 = 12

Pc = 2*Pp+Pb
Pc = 2*20 + 12 = 40 + 12 = 52 cm2

V = Pp*H
V = 20 *0,5 = 10 cm3

b)
a = 1,2 cm
Pc = 6 * a² = 6* 1,2 *1,2 = 6*1,44= 8,64 cm2

V = a³
V = 1,2*1,2*1,2 = 1,728 cm3

Answer 3

A)
V=Ppdst*H
V=(2cm*10cm)*0,5cm
V=10cm³

P=2*Ppdst+Ppowierzchni bocznej
P=2(2cm*10cm)+2(0.5cm*10cm)+2(0,5cm*2cm)
P=52cm²

b)
V=a³
V=(1.2cm)³
V=1.728cm³

P=6a²
P=6*(1.2cm)²
P=8.64cm²