koło o obwodzie 8m ma pole równe;
a. 8m2
b. 64 (pi)m2
c.16m2
d.16/pi m2
2πr = 8m
r=4/π
pole= πr²=π * 16/π²=16/π m²≈5,1 m
odp.d
ob 2(pi)r = 8 / 2
(pi)r= 4/ (pi)
r= 4/(pi)
pole (pi)r(kw)= (pi)* <4/(pi)> (kw)= 16/(pi)
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2πr = 8m
r=4/π
pole= πr²=π * 16/π²=16/π m²≈5,1 m
odp.d
ob 2(pi)r = 8 / 2
(pi)r= 4/ (pi)
r= 4/(pi)
pole (pi)r(kw)= (pi)* <4/(pi)> (kw)= 16/(pi)