Posted by **jenny** on Thursday, September 13, 2012 at 5:39pm.

The bottom of the ladder is 5 feet tall from the wall. the ladder is 13 feet long. about how high is the wall?

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**Ms. Sue**, Thursday, September 13, 2012 at 5:49pm
Time for the Pythagorean theorem since you're looking at a right-angle triangle.

a^2 + b^2 = c^2

5^2 + b^2 = 13^2

25 + b^2 = 169

b^2 = 169 - 25

b^2 = 144

b = 12

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**jenny**, Thursday, September 13, 2012 at 5:58pm
THANCK YOU SO MUCH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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**Ms. Sue**, Thursday, September 13, 2012 at 6:17pm
You're very welcome.

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