Question

Which of the following is not a property of quadrilaterals? A. There are four sides. B. There are four diagonals. C. There are four vertices. D. The measures of the interior angles add up to 360 degrees.

Answer 1

A quadrilateral has 4 vertices and the sum of the measures of the interior angles is 360 degrees.  There cannot be 4 diagonals in a quadrilateral.