The altitude and base of a right triangle are in the proportion 3:4. If the base is 20 feet, what is the altitude?
Let x = the altitude in feet. 3 / 4 = x / 20 60 = 4x x = 15 feet
Thus, the altitude is 15 feet.
Check: 15 / 20 = 3 / 4, the correct proportion.
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