A quadrilateral should be closed shape with 4 sides. All the internal angles of a quadrilateral sum up to 360°
Step-by-step explanation:
Sorry my answer is not 5 or more sentences. I hope this is good as well
For step by step explanation, go to https://e-gmat.com/blogs/quadrilateral-properties-formulas-rectangle-square-parallelogram-rhombus-trapezium-trapezoid/
Good luck on your homework/test/etc!
