Answer:
radius = 4, area = 50.25m[tex]m^{2}[/tex] and circumference = [tex]25.12mm^{2}[/tex]
Step-by-step 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: [tex]\pi r^{2}[/tex]
[tex]\pi \\[/tex] = 3.14 [tex]r^{2} = 4 * 4[/tex] ( r = radius )
so, [tex]3.14*4*4[/tex]
3.14*4*4 = 3.14 * 16 ( because 4*4 = 16 )
3.14 * 16 = [tex]50.25mm^{2}[/tex]
3. to find the circumference or the perimeter of the circle we use the formula:
[tex]2*\pi *r[/tex]
[tex]\pi = 3.14[/tex] [tex]r = 4[/tex]
[tex]2*3.14 *4\\2*3.14*4 = 6.28 * 4[/tex] ( because 2 * 3.14 = 6.28)
[tex]6.28*4 = 25.12mm^{2}[/tex]
