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The radius of a circular mirror is 4 centimeters. What is the circumference of the mirror? Tell you what value you used for pi

Respuesta :

sdmatera
The equation of circumference is C=pi*d (d=diameter)
If the radius is 4, then the diameter is twice that or 8
If you use 3.14 for pi, you do:
C=3.14*8
C=25.1 rounded to the nearest tenth
4*2*3.14?
ans= 25.12

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