Question

Proszę szybko daje dużo punktów


Oblicz pole całkowite prostopadłościanów a) 5cm x 6cm x 9 cm B) 2 dm x 0,5 m x 10 cm c) 11 cm x 11 cm x 11 cm

Answer 1

a) Pp = 5*6 = 30 cm2   (Pp - Pole podstawy)

Ps1 = 5*9 = 45 cm2   (Ps1 - Pole 1 ściany)

Ps2 = 6*9 = 54 cm2   (Ps2 - Pole 2 ściany)

Pc = 2*Pp+ 2*Ps1 + 2*Ps2 = 30*2 + 45*2 + 54*2 = 60 cm2 + 90 cm2 + 108 cm2 = 258 cm2

b) 20 cm x 50 cm x 10 cm

Pp = 20 * 50 = 1000 cm2

Ps1 = 20 * 10 = 200 cm2

Ps2 = 50 * 10 = 500 cm2

Pc = 2*Pp+ 2*Ps1 + 2*Ps2 = 1000*2 + 200*2 + 500*2 = 2000 + 400 + 1000 = 3400 cm2

c) 11 cm x 11 cm x 11 cm

Pp = 11 * 11 = 121 cm2

Pb = 11 * 11 * 4 = 121 * 4 = 484 cm2

Pc = 121 *2 + 484 cm2 = 242 + 484 cm2 = 726 cm2