Sara63
Sara63
04-03-2015
Mathematics
contestada
(link to the maths question) can anyone help?
Respuesta :
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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