given:
radius= 4 cm
to find:
the area and the diameter of the circle.
solution:
diameter:
[tex]d = 2r[/tex]
[tex]d = 2 \times 4[/tex]
[tex]d = 8 \: cm[/tex]
therefore, the diameter of the circle is 8 centimeters.
area:
[tex]a = \pi {r}^{2} [/tex]
[tex]a = \pi \times {4}^{2} [/tex]
[tex]a = 50.26548 \: {cm}^{2} [/tex]
[tex]a = 50.27 \: {cm}^{2} [/tex]
hence, the area of the circle is 50.27 square centimeters.
