Oblicz przybliżone długości promieni kół o obwodach:
a)10cm
b)628mm
a) r = 10 cm / 6,28
r ≈ 1,59 cm
b) r = 3,5 cm / 6,28
r ≈ 0,56 cm
Pozdrawiam.
!WZORY!π≈3,14L=2πr_______________
a)10=2πr |:2πr=5 |:πr=5/π≈5:3,14≈1,59cm_______________ b)
628 mm = 2πrr = 628 mm/6,28 = 100 mm = 10 cm
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a) r = 10 cm / 6,28
r ≈ 1,59 cm
b) r = 3,5 cm / 6,28
r ≈ 0,56 cm
Pozdrawiam.
!WZORY!
π≈3,14
L=2πr
_______________
a)
10=2πr |:2
πr=5 |:π
r=5/π≈5:3,14≈1,59cm
_______________
b)
628 mm = 2πr
r = 628 mm/6,28 = 100 mm = 10 cm