Respuesta :

wegnerkolmp2741o

Answer:

The radius is approximately .33 cm

Step-by-step explanation:

We know the circumference of a circle is given by

C = 2*pi*r

We can approximate pi by 3.14

2.1 = 2*31.4 *r

2.1 = 6.28r

Divide each side by 6.28

2.1/6.28 = 6.28r/6.28

.334394904 =r

The radius is approximately .33 cm

abiolatolu90

Answer:

The radius is 0.33 cm

Step-by-step explanation:

If the circumference is 2.1 cm, and say [tex]\pi[/tex] = 22/7

C = [tex]2\pi r[/tex]

If the make r the subject of formula, then we divide both sides by [tex]2\pi[/tex]

r = C/[tex]2\pi[/tex]

r = 2.1/(2*22/7)

r = 2.1/(44/7)

r = (2.1*7)/44

r = 14.7/44

r ≈ 0.33 cm

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