Question

block date:
ms on circumference and area of a circle. show in writing how you get the answer.
appropriate formula in finding circumference and area of a circle.
circumference of circles (a)
area and circumference of each circle.
d = 5.2 cm
circumference =
area =

Explanation:

Step1: Find the radius

Given diameter \(d = 5.2\) cm. The radius \(r=\frac{d}{2}\), so \(r=\frac{5.2}{2}=2.6\) cm.

Step2: Calculate the circumference

The formula for the circumference of a circle is \(C = \pi d\) (or \(C = 2\pi r\)). Using \(C=\pi d\) with \(\pi\approx3.14\) and \(d = 5.2\) cm, we have \(C=3.14\times5.2 = 16.328\) cm.

Step3: Calculate the area

The formula for the area of a circle is \(A=\pi r^{2}\). Substituting \(r = 2.6\) cm and \(\pi\approx3.14\), we get \(A=3.14\times(2.6)^{2}=3.14\times6.76 = 21.2264\) \(cm^{2}\).

Answer:

circumference \(= 16.328\) cm, area \(=21.2264\) \(cm^{2}\)