4. Alice bought a circular miror that has a
circumference of 28.26 cm. find the radius of the
circular mirror
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4. Alice bought a circular miror that has a
circumference of 28.26 cm. find the radius of the
circular mirror
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SOLUTION:
[tex]\large{Formula = radius =\frac{C}{2π}}[/tex]
[tex]\large{r =\frac{28.26}{2π}}[/tex]
[tex]\large{r =\frac{28.26}{2(3.14)}}[/tex]
[tex]\large{r =\frac{28.26}{6.28}}[/tex]
[tex]\large\boxed{radius = 4.5 cm}[/tex]
Example 1 :
A circle has a circumference 21cm.
Find the radius of the circle.
SOLUTION:
[tex]\large{r =\frac{21}{2 × 3.14}}[/tex]
[tex]\large{r =\frac{20}{6.28}}[/tex]
[tex]\large\boxed{r = 3.34cm}[/tex]
Example 2:
A circle has a circumference 17 m.
Find the radius of the circle.
SOLUTION:
[tex]\large{r =\frac{17}{2 × 3.14}}[/tex]
[tex]\large{r =\frac{17}{6.28}}[/tex]
[tex]\large\boxed{r = 2.71m}[/tex]
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