Promien podstawy stozka r=5 a tworzaca L=13 Oblicz pole boczne i objetosc tego stozka prosze szczegolowo pilne ;)
obliczm H z tw. pitagorasa.
H kwadrat = l kwadrat - r kwadrat
H kwadrat = 13 kwadrat - 25 kwadrat
H = 12
obliczam V ;
V = 1/3 pi r kwadrat * H
V = 1/3 pi * 25 * 12
V = 100 pi.
obliczam Pb ;
Pb = pi r l
pb = pi* 5*13
pb = 65 pi
Dane : Szukane :
Pb = ?
r= 5 cm
l=13cm
Pb=(pi)*r*l
Pb =(pi)*5cm*13cm
Pb=65(pi)cm (kwadratowych )
V=1/3 Pp*H
V=1/3(pi)*(5cm) do kwadratu*13cm
V=65/3 (pi) cm szesciennych
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obliczm H z tw. pitagorasa.
H kwadrat = l kwadrat - r kwadrat
H kwadrat = 13 kwadrat - 25 kwadrat
H = 12
obliczam V ;
V = 1/3 pi r kwadrat * H
V = 1/3 pi * 25 * 12
V = 100 pi.
obliczam Pb ;
Pb = pi r l
pb = pi* 5*13
pb = 65 pi
Dane : Szukane :
Pb = ?
r= 5 cm
l=13cm
Pb=(pi)*r*l
Pb =(pi)*5cm*13cm
Pb=65(pi)cm (kwadratowych )
V=1/3 Pp*H
V=1/3(pi)*(5cm) do kwadratu*13cm
V=65/3 (pi) cm szesciennych