$\"\"$

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

To find: side a.

Apply Pythagorean theorem: $\"a$

$\"\"$ (Substitute 24 for b and 25 for c)

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

$\"\"$ (Subtract 576 from each side)

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

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

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

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

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