You start driving south for 2 miles, turn left, and drive east for another 9 miles. At the end of driving, what is your straight line distance from your starting point? Round to the nearest tenth of a mile.

1 answer

To find the straight line distance from your starting point after driving south for 2 miles and then east for 9 miles, we can use the Pythagorean theorem.

You end up at a point that is 2 miles south and 9 miles east of your starting point. This forms a right triangle where:

  • One leg (south) = 2 miles
  • The other leg (east) = 9 miles

We can denote the distance from the starting point to the end point as \(d\). According to the Pythagorean theorem:

\[ d^2 = (2 \text{ miles})^2 + (9 \text{ miles})^2 \]

Calculating the squares:

\[ d^2 = 4 + 81 \] \[ d^2 = 85 \]

Now, we'll take the square root to find \(d\):

\[ d = \sqrt{85} \approx 9.2195 \]

Rounded to the nearest tenth of a mile, \(d\) is approximately 9.2 miles.

Thus, the straight line distance from your starting point is 9.2 miles.