Find the radius of the button.

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Solution

Given: Diameter of the circle(d)= $3 \frac{1}{2}$ inches
⇒ d = $\frac{7}{2}$ [Converting mixed fraction into improper fraction]
⇒ d = $3.5$ inches
We know that,
Radius (r) = $\frac{d}{2}$
⇒ r = $\frac{3.5}{2}$
$∴$ r = $1.75$ in.
Hence the radius of a button is $1.75$ inches.

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Find the radius of the button.

Given: Diameter of the circle(d)= 312inches⇒ d = 72 [Converting mixed fraction into improper fraction]⇒ d = 3.5 inchesWe know that,Radius (r) = d2⇒ r = 3.52∴ r = 1.75 in.Hence the radius of a button is 1.75 inches.

Given: Diameter of the circle(d)= $3 \frac{1}{2}$ inches
⇒ d = $\frac{7}{2}$ [Converting mixed fraction into improper fraction]
⇒ d = $3.5$ inches
We know that,
Radius (r) = $\frac{d}{2}$
⇒ r = $\frac{3.5}{2}$
$∴$ r = $1.75$ in.
Hence the radius of a button is $1.75$ inches.