3. It is the most rigid polygon and often used in engineering and architecture. A. square C. triangle D. circle B. rectangle 4. What is a diagonal? A. a polygon with four sides B. a segment that connects any two non-consecutive vertices in a polygon C. a segment that cuts through a polygon at 45 degrees D. a 90-degree angle 5. Below are the characteristics of a polygon EXCEPT A. It is a closed figure that consists of 3 to 4 coplanar segments B. It is a four-sided figure only C. It is with segment that intersect only at endpoints D. Its vertex belongs to exactly two segments and no two segment with a common endpoint are collinear X​