Anthony's position and the field goal form a right triangle, where how far he must kick the ball has the hypotenuse length.
Using the Pythagora's Theorem, we have the following equation
[tex]10^2+45^2=h^2[/tex]Solving for h, we have
[tex]\begin{gathered} 10^2+45^2=h^2 \\ 100+2025=h^2 \\ 2125=h^2 \\ h=\sqrt[]{2125} \\ h=46.0977222865\ldots \end{gathered}[/tex]And this is how far he must kick.