To find the area of circle
formula
[tex]a = \pi \: r {}^{2} \\ [/tex]
So,
Diameter is 26
to make radius
26÷2=13
Now we got the radius 13
Apply in the formula
[tex]a = \pi \: (13) {}^{2} \\ a =530.92 [/tex]
The answer is 530.92
if you wana Round it 530.93
Hope this Help:))