Question

c= 3.14
a=
0.4 yd
c=
a=

Explanation:

Step1: Calculate the circumference

The formula for the circumference of a circle is \(C = \pi d\). Given \(d = 0.4\) yd and \(\pi\approx3.14\), we substitute the values:
\(C=3.14\times0.4 = 1.256\) yd.

Step2: Calculate the radius

The radius \(r=\frac{d}{2}\). Since \(d = 0.4\) yd, then \(r=\frac{0.4}{2}=0.2\) yd.

Step3: Calculate the area

The formula for the area of a circle is \(A=\pi r^{2}\). Substitute \(r = 0.2\) yd and \(\pi\approx3.14\):
\(A = 3.14\times(0.2)^{2}=3.14\times0.04 = 0.1256\) \(yd^{2}\).

Answer:

\(C = 1.256\) yd, \(A=0.1256\) \(yd^{2}\)