385,082 views
29 votes
29 votes
Use the Pythagorean Theorem to solve the given problem. Hint: Draw a picture or diagram.

A ten-foot-tall flag post is broken a fourth of the way up the post. The flag post is still barely connected where it broke and the tip of the flag post is touching the ground. How far is the tip of the flag post from the base of the flag post?

User Sorrell
by
2.7k points

1 Answer

15 votes
15 votes

Answer:

Solution 2. A right triangle is formed with the bottom of the flagpole, the snapped part, and the ground. One leg is of length $1 ...

Missing: picture ‎way ‎barely

Explanation:

A flagpole is originally $5$ meters tall. A hurricane snaps the flagpole at a point $x$ meters above the ground so that the upper part, still attached to the stump, touches the ground $1$ meter away from the base. What is $x$?

$\text{(A) } 2.0 \qquad \text{(B) } 2.1 \qquad \text{(C) } 2.2 \qquad \text{(D) } 2.4 \qquad \text{(E) } 2.5$

Solution 1

The broken flagpole forms a right triangle with legs $1$ and $x$, and hypotenuse $5-x$. The Pythagorean theorem now states that $1^2 + x^2 = (5-x)^2$, hence $10x = 24$, and $x=\boxed{2.4}$.

(Note that the resulting triangle is the well-known $5-12-13$ right triangle, scaled by $1/5$.)

Solution 2

A right triangle is formed with the bottom of the flagpole, the snapped part, and the g

User Lureen
by
3.0k points