Using Pythagoras.

13^2 = 5^2 +x^2 when x is the distance from the door.

169 = 25 + x^2

144 = x^2

x = 12

12 feet

Using Pythagoras.

13^2 = 5^2 +x^2 when x is the distance from the door.

169 = 25 + x^2

144 = x^2

x = 12

12 feet

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