Question

Help me plsss , I really need this answer

Answer 1

radius = 4, area = 50.25m
`m^(2)` and circumference =
`25.12mm^(2)`

Explanation:

1.the radius of the circle is 4mm

because in the picture it was given the diameter of the circle and the radius is half of the diameter. so, 8/ 2 = 4

2. to find the area of the circle we use the formula:
`\pi r^(2)`

`\pi \\` = 3.14
`r^(2) = 4 * 4` ( r = radius )

so,
`3.14*4*4`

3.14*4*4 = 3.14 * 16 ( because 4*4 = 16 )

3.14 * 16 =
`50.25mm^(2)`

3. to find the circumference or the perimeter of the circle we use the formula:

`2*\pi *r`

`\pi = 3.14`
`r = 4`

`2*3.14 *4\\2*3.14*4 = 6.28 * 4` ( because 2 * 3.14 = 6.28)

`6.28*4 = 25.12mm^(2)`