Answer :
Step-by-step explanation:
The diameter of a circle is twice the length of its radius. The formula for finding the diameter \(d\) when you know the radius \(r\) is:
\[ d = 2r \]
Using this formula, we can find the diameters for the given radii:
1. When the radius \(r = 2.5 \, \text{cm}\):
\[ d = 2 \times 2.5 \, \text{cm} = 5 \, \text{cm} \]
2. When the radius \(r = 3.1 \, \text{cm}\):
\[ d = 2 \times 3.1 \, \text{cm} = 6.2 \, \text{cm} \]
3. When the radius \(r = 4.5 \, \text{cm}\):
\[ d = 2 \times 4.5 \, \text{cm} = 9 \, \text{cm} \]
4. When the radius \(r = 3.3 \, \text{cm}\):
\[ d = 2 \times 3.3 \, \text{cm} = 6.6 \, \text{cm} \]
So the diameters are:
(i) 5 cm
(ii) 6.2 cm
(iii) 9 cm
(iv) 6.6 cm
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