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Bot GPT 4-o mini To determine the height of one stair step in a staircase that has a rise of 9 inches and a run of 15 inches, we can interpret the 9-inch measurement as the vertical rise of each individual step.
In most stair designs, the height of a single stair (or step) is typically defined as the "rise." In this case, given that the rise is specified as 9 inches, the height of one stair step is:
**Height of one stair step = 9 inches.**