Oblicz pole koła opisanego na trójkącie równobocznym o boku 5 cm
P=\pi*r^{2}
P= 3,14*2,5^{2}=19,625
a = 5 cm
h - wysokość tego trójkąta
h = a p(3)/2 =5 p(3)/2 = 2,5 p(3)
h = 2,5 p(3) cm
r - promień koła opisanego
r = (2/3) h
r = (2/3)* 2,5 p(3) cm = (5/3) p(3 ) cm
Pole koła opisanego
P = pi *r^2 = pi * [ (5/3) p(3) cm ]^2 = pi * (25/9)* 3 cm^2
P = (25/3) pi cm^2
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P=\pi*r^{2}
P= 3,14*2,5^{2}=19,625
a = 5 cm
h - wysokość tego trójkąta
h = a p(3)/2 =5 p(3)/2 = 2,5 p(3)
h = 2,5 p(3) cm
r - promień koła opisanego
r = (2/3) h
r = (2/3)* 2,5 p(3) cm = (5/3) p(3 ) cm
Pole koła opisanego
P = pi *r^2 = pi * [ (5/3) p(3) cm ]^2 = pi * (25/9)* 3 cm^2
P = (25/3) pi cm^2
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