Răspuns :

Răspuns:

Explicație pas cu pas:

a) 360°.................2π6 cm

 150°.......................x=150·12π/360=15π/3=5πcm

Larc=5π cm

b)360°..........................2π4,2 m

270°..............................y=2π·4,2·270°/360°=8,4π·3/4=2,1π×3=6,3π m

L arc=6,3π m

c)  360°.............................2π8 cm

      60°..............................z=2π8·60/360=16π/6=8π/3=2,(6)π  cm

L arc=2,(6)π  cm

d)  360°...............................2π5 cm

   180°..................................t=10π×180/360=10π/2=5π cm

Larc=5π cm
4) Larc = u x 2pi r : 360
5) L = 150 x 2 pi 6 : 360 = 5pi cm
L = 270 x 2 pi 4,2 : 360 = 6,3pi m
L = 60 x 2 pi 8 : 360 = 8pi:3 cm
L = 180 x 2 pi 5 : 360 = 10pi cm

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