The bottom of a ladder must be placed 3 feet from the wall. The ladder is 12 feet long.
How far above the ground does the ladder touch the wall?
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3
Answer:
11.61 ft
Step-by-step explanation:
By Pythagoras' Theorem we have.,
AB² = AC² + BC²
AC² = AB² - BC²
= 12² - 3²
= 144 - 9
AC² = 135
=√135
=11.61
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