A building has a window that is 12 feet high. Stan is going to use a ladder to get up to the window and decides to keep the ladder 5 feet away from the side of the building. How long does the ladder need to be?

Question

Luis Morrison

Mathematics

12 October, 17:12

A building has a window that is 12 feet high. Stan is going to use a ladder to get up to the window and decides to keep the ladder 5 feet away from the side of the building. How long does the ladder need to be?

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Mcpherson · Answer 1

Answer=13 feet long

This information describes a right triangle, with sides 5ft and 12ft.

a²+b²=c²

5²+12²=c²

25+144=c²

169=c²

√169=√c²

13=c

The ladder needs to be 13ft long