V=abc P=2ab+2bc+2ca a) a = 6 cm b = 3 cm c = 9 cm V=6*3*9=162cm³ P=2*6*3+2*3*9+2*9*6=36+54+108=198cm² b) a = 6 dm b = 60 cm=6dm c = 4,2 dm V=6*6*4,2=151,2dm³ P=2*6*6+2*6*4,2+2*4,2*6=72+50,+50,4=172,8dm² c) a = 2 m b = 0,4 m c = 2,8 dm=0,28m V=2*0,4*0,28=0,224m³ P=2*2*0,4+2*0,4*0,28+2*0,28*2=1,6+0,224+1,12=2,944m²
Oblicz objętość i pole powierzchni prostopadłościanu o wymiarach :objetosc prostopadloscianu to V = abc powierzchnia calkowita P = 2ab + 2bc + 2ac a) a = 6 cm b = 3 cm c = 9 cm V = 6cm * 3cm * 9cm = 18cm² * 9cm = 162cm³ P = 2 * 6cm * 3cm + 2 * 3cm * 9cm + 2 * 6cm * 9cm = = 2 * 18cm² + 2 * 37cm² + 2 * 54cm² = = 36cm² + 74cm² + 108cm² = 110cm² + 108cm² = 218cm² b) a = 6 dm b = 60 cm = 6dm c = 4,2 dm V = 8dm * 6dm * 4,2dm = 48dm² * 4,2dm = 201,6dm³ P = 2 * 6dm * 6dm + 2 * 6dm * 4,2dm + 2 * 6dm * 4,2dm = = 2 * 36dm² + 2 * 25,2dm² + 2 * 25,2dm² = = 72dm² + 50,4dm² + 50,4dm² = 72dm² + 100,8dm² = 172,8dm² c) a = 2 m = 20dm b = 0,4 m = 4dm c = 2,8 dm V = 20dm * 4dm * 2,8dm = 80dm² * 2,8dm = 224dm³ P = 2 * 20dm * 4dm + 2 * 4dm * 2,8dm + 2 * 20dm * 2,8dm = = 2 * 80dm² + 2 * 11,2dm² + 2 * 56dm² = 160dm² + 22,4dm² + 112dm² = = 182,4dm² + 112dm² = 294,4dm²
