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The circumference of a circle is 6.28 millimeters. What is the circle's diameter?

plsssss i need help!!!!!!!!

User Llazar
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the diameter would be 2. i hope this helps!
The circumference of a circle is 6.28 millimeters. What is the circle's diameter? plsssss-example-1
User Ashish Lahoti
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6 votes

Ⲁⲛ⳽ⲱⲉⲅ:

  • Diameter = 2 mm ( approx )


\quad{\rule{300pt}{1.5pt}}\quad

Ⲋⲟⳑⳙⲧⳕⲟⲛ :

We are given that :

  • The circumference of a circle is 6.28mm

We know that :


\qquad\bull{\boxed {\mathfrak{Circumference = 2 \pi r }}}\bull

Therefore,


\quad\dashrightarrow\quad \sf { 6.28 = 2 \pi r }


\quad\dashrightarrow\quad \sf {r = (6.28)/(2\pi) }


\quad\dashrightarrow\quad \sf {r = (6.28* 7)/(22* 2) }


\quad\dashrightarrow\quad \sf {r =\cancel{(43.64)/(44)} }


\quad\dashrightarrow\quad \sf {r = 0.9989 }

As we know,


\quad\dashrightarrow\quad \sf { Diameter = 2* radius}


\quad\dashrightarrow\quad \sf { Diameter = 2* 0.9989}


\quad\dashrightarrow\quad \sf { Diameter = 1.98 }


\quad\dashrightarrow\quad {\pmb{\sf {Diameter = 2 mm ( approx ) }}}


\rule{300pt}{2pt}

User Liran Barniv
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8.7k points

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