Question

The dimeter of a circle is 8.2 cm, find its radius​

Answer 1

The radius is 4.1.

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In order to find the radius of a circle, apply the formula :

`\longrightarrow\quad\sf{r=\cfrac{d}{2}}`

where d = diameter

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Our next step is to substitute 8.2 for the diameter of the circle :

`\longrightarrow\quad\sf{r=\cfrac{8.2}{2}}`

`\longrightarrow\quad\sf{r=4.1}`

∴ The radius of the circle is 4.1 cm.

Answer 2

4.1 cm

Explanation:

By definition, a radius is one half of the diameter:

Radius = (1/2)(Diameter)

Radius = (1/2)(8.2 cm)

Radius = 4.1 cm