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3. A circle has a radius of 30 decimeters, give the circumference of this circle Find the circumference of a circle:



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CIRCUMFERENCE

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[tex]\large\sf\underline{Problem:} [/tex]

  • A circle has a radius of 30 decimeters, give the circumference of this circle.

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[tex]\large\sf\underline{Answer:} [/tex]

[tex]\qquad \qquad \huge \rm188.4\:dm[/tex]

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[tex]\large\sf\underline{Solution:} [/tex]

Solve the equation for C. This will give you the circumference of your circle.

  • [tex]\bold{Formula\:||\:Circumference = 2πr}[/tex]

your equation is C = 2π(30 dm),multiply radius from each side.

  • [tex]\rm C = 2π(30)[/tex]

  • [tex]\rm C = (60)π [/tex]

Let 3.14 be the approx value of pi

  • [tex]\rm C = (3.14) (60)[/tex]

  • [tex]\rm C = 188.4[/tex]

Therefore, the circumference of a circle is 188.4 square decimetre.

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