Respuesta :

Use similar triangles to solve this.  3 is to 36 as 5 is to x.  Setting that up as a proportion gives us  [tex] \frac{3}{36}= \frac{5}{x} [/tex].  Cross-multiply to get 3x=180.  That means that the length of the ladder has to be 60 feet long to be safe.
Creati
Hello!

You can make a proportion

[tex] \frac{3}{5} = \frac{36}{x} [/tex]

Cross multiply

36 × 5 = 180

Divide by 3

180 ÷ 3 = 60

[tex]\framebox {60 feet}[/tex]