How many latitude circles can be drawn on a globe at 1° intervals, excluding…
2023
How many latitude circles can be drawn on a globe at 1° intervals, excluding the two pole points?
Answer: A. 179 — CONCEPTA latitude line is a circle parallel to the Equator. The Equator is a complete circle, while 90° N and 90° S are the two poles—single points rather…
- A.
179
- B.
180
- C.
181
- D.
More than one of the above
- E.
None of the above
Attempted by 17 students.
Show answer & explanation
Correct answer: A
CONCEPT
A latitude line is a circle parallel to the Equator. The Equator is a complete circle, while 90° N and 90° S are the two poles—single points rather than drawable latitude circles.
APPLICATION
In the Northern Hemisphere, the drawable latitude circles are 1° N through 89° N: 89 circles.
In the Southern Hemisphere, the drawable latitude circles are 1° S through 89° S: 89 circles.
Add the Equator: 89 + 89 + 1 = 179 latitude circles.
CROSS-CHECK
The drawable integer-degree parallels are −89° through 0° to +89°. This inclusive sequence contains 179 values; ±90° are excluded because they are points.
Therefore, the answer is 179.