Answered

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Pretest: Unit 3
Question 12 of 28
A ladder leans against a 15-foot-tall building to form a right triangle. The
ladder is placed so it is 8 feet from the base of the building. What is the
length of the ladder?
A. 289 ft
OB. 17 ft
O C. 13 ft
D. 161 ft
←BREMQU
Building
15 ft
Ladder
8 ft
42
XA
18

Sagot :

Using Pythagoras we know a^2 + b^2 = c^2 so
8x8 + 15x15 = c^2
64 + 225 = 289

So 289 = c^2
If we square root both sides c = 17
So the answer is 17ft
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