Question

1. 5. 6. area = area = area = circumference = circumference = circumference =

Explanation:

4.

Step1: Calculate area

The formula for the area of a circle is \(A = \pi r^{2}\). Given \(r = 2\), then \(A=\pi\times2^{2}=4\pi\approx 4\times3.14 = 12.56\).

Step2: Calculate circumference

The formula for the circumference of a circle is \(C = 2\pi r\). Given \(r = 2\), then \(C=2\pi\times2 = 4\pi\approx4\times3.14=12.56\).

5.

Step1: Find radius

Since \(d = 22\), then \(r=\frac{d}{2}=\frac{22}{2}=11\).

Step2: Calculate area

Using \(A=\pi r^{2}\), with \(r = 11\), \(A=\pi\times11^{2}=121\pi\approx121\times3.14 = 379.94\).

Step3: Calculate circumference

Using \(C = 2\pi r\) (or \(C=\pi d\)), with \(d = 22\), \(C=\pi\times22=22\pi\approx22\times3.14 = 69.08\).

6.

Step1: Calculate area

Using \(A=\pi r^{2}\), with \(r = 8\), \(A=\pi\times8^{2}=64\pi\approx64\times3.14=200.96\).

Step2: Calculate circumference

Using \(C = 2\pi r\), with \(r = 8\), \(C=2\pi\times8=16\pi\approx16\times3.14 = 50.24\).

Answer:

1. Area: \(12.56\), Circumference: \(12.56\)
2. Area: \(379.94\), Circumference: \(69.08\)
3. Area: \(200.96\), Circumference: \(50.24\)