Yes, Scissors Are Required (Count 'em All 12!)
Discrete Mathematics
Level
3
The figure above shows a \(6\times5\) grid but with one of its corners cut off forming a triangle.
Count the total number of quadrilaterals in the grid above.
Clarification:
- A quadrilateral is a polygon that has 4 sides.
This is one part of Quadrilatorics.
by
Kenneth Tan