obim kruga
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Obim kruga
1
2
3
prečnik(R)
Obim (O)
Koliko puta možemo da obavijemo prečnik okokruga? Izaberi broj
1 1! 2 2! 3 3! "
3 . 1 4 1 5 9 2 6 5 3 5 8 9 7 9 3 2 3 8 4 6 2 6 4 3 3 8 3 2 7 9 5 0 2 8 8 4 1 9 7 1 6 9 3 9 9 3 7 5 1 0 5 8 2 0 9 7 4 9 4 4 5 9 2 3 0 7 8 1 6 4 0 6 2 8 6 2 0 8 9 9 8 6 2 8 0 3 4 8 2 5 3 4 2 1 1 7 0 6 7 9 . . . . . . . . . π #
d
17
poluprečnik
$ko je zadat poluprečnik%
O #?
O #2πr
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Računa &e i&to za &ve krugove'
Obim kruga
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Obim kruga
ai obime dati* krugova
O # πR
O # 2πr
+ ,m
1
-. ,m
2
O # πR
O#π
/ +O = 2.1 ,m
O # πRO# π / -.
O # 2-+ ,m
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O # 2πr
O # 2 / π / 3
O # 1++ mm
O # 2πr
O # 2 / π / 21
O # 132 m
Obim kruga
ai obime dati* krugova
O # πR
O # 2πr
3 mm
"
21 m
3
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23 ,m
0. ,m
ai prečnik automobil&ke gume i volana%
O # πR
O# π / 23
O =
023 ,m
O # 2πr
O # 2 / π / 0.
O # "01 ,m (1 dp)
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Obim kruga
ai obim dati* polukrugova%
O # πR
O # 2πr
+ ,m
1
-. ,m
2
O # !πR R #
! /π
/ + + #2 ,m
O # !πR R #
! /π
/ -. -. #2"" ,m
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O # 4(2πr) 2r #
4 / 2 / π / 2 / #
21" ,m
O # 5(2πr) 2r #
5 / 2 / π / +. 2 / +. #
.01 ,m
Obim kruga
ai obim 4 i 5 krugova
O # πR
O # 2πr3 "
,m+. ,m
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6*e 7ir,um8eren,e o8 a 7ir,le
ai prečnik9poluprečnik dati* krugova
O # πR
O # 2πr
O # 2. ,m: nai prečnik
.
πR # 2.
R # 2.9π
R # + ,m
2πr # 3
r # 39(2π)
r # "+ ,m
O # 3 ,m: nai poluprečnik