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Step 1: Use the Pythagorean theorem to find the height of the cone. The slant height, height, and radius form a right triangle. So we can use the formula:
\( height = \sqrt{slant\ height^2 - radius^2} \)
Step 2: Substitute in the given values:
\( height = \sqrt{13^2 - 5^2} \)
Step 3: Calculate the values inside the square root:
\( height = \sqrt{169 - 25} = \sqrt{144} \)
Step 4: Finally, find the square root of 144:
\( height = 12 \) cm
Therefore, the height of the cone is 12 cm.