The ladder is 10 m long
The ladder is 8 m high
How many meters is the distant heel from the wall?

Result

x =  6 m

#### Solution:

$c=10 \ \text{m} \ \\ a=8 \ \text{m} \ \\ x=\sqrt{ c^2-a^2 }=\sqrt{ 10^2-8^2 }=6 \ \text{m}$

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