Question

A ladder 12 feet long leans against a wall it rest on the ground 9 feet from the wall. How high on the wall does the ladder rest?

Answer 1

√63 or 7.94

Explanation:

To solve this, I used the Pythagorean Theorem which states "a² + b² = c²".

The ladder's length - 12 - would be the hypotenuse; c. The ladder is 9 feet away from the wall. To find how high the ladder rests on the wall:

c² - b² = a²

12² - 9² = c²

144 - 81 = 63

√63 = 7.9372539331937717715048472609178

We can round this to 7.94 But the answer will most likely be √63.

Hope this helps,

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