Diameter of the Circle
≈
13.4
''
Explanation:
Formula to find the Circumference of a Circle when the diameter (d) is available is
π
d
.
We are given the Circumference
42
''
.
We must find the Diameter (d).
Diameter (d) = Circumference/
π
Hence, form the equation first.
π
⋅
d
=
42
⇒
d
=
42
π
⇒
d
=
42
22
7
⇒
d
=
42
⋅
(
7
22
)
⇒
d
≈
13.36363636
(using the calculator)
Hence, Diameter of the Circle
≈
13.4
''
.
