Question

If the diameter of a whole circle is 8, what is the arc length of half of that circle.

Answer 1

Answer:

r=1/2 d

r=4

circumference of half of the circle

=1/2(2πr)

=πr

=22/7(4)

=88/7

Answer 2

Okay!, Let's do some math.

Since the diameter is 8 the radius is 4

Formula :

(angle of arc)/360) x 2 x π x r

Angle of arc = 360

π = Approx 3.14

r = 4

Lets replace the variables!

(360/360) x 2 x (approx 3.14) x 4

Arc length = 25.12