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Sara63
Sara63 Sara63
  • 04-03-2015
  • Mathematics
Answered

(link to the maths question) can anyone help?

(link to the maths question) can anyone help? class=
(link to the maths question) can anyone help? class=

Verified Answer :

apologiabiology
apologiabiology apologiabiology
  • 04-03-2015

first one

20cm=diameter
perimiter of this one is (pi times radius^2)divided by 2+ 20

diameter=2radius
radius=diameter times 1/2
diameter=20
20/10=radius=10

3.14 times 10^2=314
314 times 1/2=157
157+20=177 cm
perimiter=177 cm

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