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mihalych1998 [28]
4 years ago
13

(link to the maths question) can anyone help?

Mathematics
1 answer:
andrew-mc [135]4 years ago
6 0
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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