[tex]\large \begin{array} {|c|c|c|c|} \hline \sf Diameter & \sf Radius & \sf r^2 & \sf Area \\ \hline \sf 1. \ \ 4 \ cm & \sf 2 \ cm & \sf 4 \ cm^2 & \sf 12.56 \ cm^2 \\ \hline \sf 2. \ \ 16 \ m & \sf 8 \ m & \sf 64 \ m^2 & \sf 200.96 \ m^2 \\ \hline \sf 3. \ \ 26 \ ft & \sf 13 \ ft & \sf 169 \ ft^2 & \sf 530.66 \ ft^2 \\ \hline \sf 4. \ \ 38 \ m & \sf 19 \ m & \sf 361 \ m^2 & \sf 1133.54 \ m^2 \\ \hline \sf 5. \ \ 50 \ m & \sf 25 \ m & \sf 625 \ m^2 & \sf 1962.5 \ m^2 \\ \hline \end{array}[/tex]
