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Find the circumference of the circle with the given radius or diameter. (Use 3.14 for π.)

diameter = 11 cm
a.
379.94 cm
b.
34.54 cm
c.
94.99 cm
d.
17.27 cm

Respuesta :

the circumference of a circle is "C= 2лr" (I couldn't find the symbol for pi". The radius is half the diameter. The diameter is 11cm, so the radius is 5.5. Now plug in the numbers into the formula. C = 2*3.14*5.5. The circumference is B. 34.54
facundo3141592

Answer: option b; 34.54 cm

Explanation:  

The circumference of a circle is given by:

C = 2*pi*r

where r is the radius of the circle, and pi is the irrational constant:

pi = 3.14...

In this problem, we know that the diameter of the circle is equal to 11 cm

We also know that the relation between the diameter and the radius of a circle is given by:

d = 2r

So the equation of the circumference may be written as:

C = 2r*pi = d*pi = 11cm* 3.14 = 34.54cm

So the right option is B.

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