Two variables: A and B

$\displaystyle \sqrt{A^{2}+B^{2}}$ is the long side of a right triangle with the sides $\displaystyle A$ and $\displaystyle B$. Use other variables in a calculation: $\displaystyle A$ and $\displaystyle B$. The expression is $\displaystyle \sqrt{A^{2}+B^{2}}$. Press the , , , , , , , and . Pressing , gives you the opportunity to enter a value for each variable of the expression, here $\displaystyle A$ and $\displaystyle B$. $\displaystyle A$ is 2, . $\displaystyle B$ is 3, . The answer is $\displaystyle \sqrt{13}$. Try other values: , . $\displaystyle A$ stays 2, so press . $\displaystyle B$ is 5, : $\displaystyle \sqrt{29}$.

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