Explain your reasoning, the distance around a circle a times the diameter the (5cm) Praciice and Problem Find the radius of the button.

Question
Circles
Explain your reasoning, the distance around a circle a times the diameter the (5cm) Praciice and Problem Find the radius of the button.

2020-10-21
The radius rr is half the length of the diameter dd. Given a diameter of 5 cm, the radius is:
$$\displaystyle{r}={\frac{{{1}}}{{{2}}}}{d}$$
$$\displaystyle{r}={\frac{{{1}}}{{{2}}}}{\left({5}\right)}$$
$$\displaystyle{r}={2.5}{c}{m}$$

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Previous studies show that $$\sigma_1 = 19$$.
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