Explanation:
The statement all quadrilaterals have at least one line of symmetry is incorrect.
What is quadrilaterals?
A quadrilaterals is a "closed shape and type of polygon that has four sides, four vertices, four angles".
According to the question,
- Dave says, All quadrilaterals have at least one lines of symmetry. For a quadrilaterals, a line of symmetry must either match two vertices on one side of the line with two vertices on the other or it must pass through two of the vertices and then the other two vertices pair up when folded over the line.
- From this we clearly understand all quadrilaterals need not have at least one lines symmetry.
Hence, the statement all quadrilaterals have at least one line of symmetry is incorrect.