Geometric puzzle

Extension: 1)If there are 60 equally spaced points on the circumference of the circle, then which number will be diametrically opposite to 23?

    2)  Check if the same problem would work when the points are equally spaced on a triangle instead of circle.

what makes this puzzle truly geometric, rather than simply logical?

This problem is related to circumference and diameter of the circle. All the points are equally spaced on the circumference of the circle, and we need to find out the dramatically opposite points which we can find out for all the numbers. Therefore, this puzzle is truly geometric as it includes the circle and its circumference and diameter.