$\"\"$

The lengths of two sides of a right triangle are $\"\"$ .

To find: side b.

Apply Pythagorean theorem: $\"a$

$\"\"$ (Substitute $\"\"$ for a and 61 for c)

$\"\"$ (Evaluate powers: $\"\"$ ) $\"\"$

$\"\"$ (Subtract 177 from each side)

$\"\"$ (Subtract: $\"\"$ )

$\"\"$ (Apply square root to each side)

$\"\"$ (Write $\"\"$ )

$\"\"$ (Cancel square and root) $\"\"$

The length of the third side $\"\"$ .