Answer and Explanation
Your Answer is
Correct Answer is A
Explanation
A total of 6 points, two-two connection, a total of 6×5÷2=15 connection methods, so choose A
27. Minh cuts a board in the shape of a regular hexagon and pounds in a nail at an equal distance from each vertex, as shown in the figure below. How many rubber bands will she need in order to stretch a different rubber band across every possible pair of nails?
