What is the circumfrance of a circle that has a diameter of 7cm?

Answer 1

Let me make a data firstly

Data:

diameter = 7 cm

required:

circumference=???

formula and solution:

circumference=2*pie*r (radius)

so here 2 and pie are constant values

but we dont have radius

for radius,

we have formula

r=d/2

substituting the value of d in above equation

r=7/2 =3.5 cm

now CIRCUMFERENCE =2*pie*r pie=3.14 , r=3.5

=2(3.14)(3.5)

21.98 or 22.00 (by rounding off ) ANSWER