If the Earth were a flat surface, then 9 miles east and 12 miles north would be
the basis of a right triangle, and the straight-line route would be the hypotenuse.
We could use the Pythagorean Theorem to find the straight-line distance.
A² + B² = C²
C² = (9)² + (12)²
C² = 81 + 144
C² = 225
C = √225 = <u>15 miles</u>
That's Choice-'H'.
Answer:
Radius is 13
13 x 3.14 x 2 = 81.64
Formula of circumference:
2 x pie(3.14 or 22/7) x r (radius