1
5 diagonals * * * * * That is not correct since two of these would be lines joining the vertex to adjacent vertices (one on either side). These are sides of the polygon, not diagonals. The number of diagonals from any vertex of a polygon with n sides is n-3.
A quadrilateral has four exterior angles, one at each vertex. The sum of these exterior angles is always 360 degrees, regardless of the shape of the quadrilateral. Each exterior angle is formed by extending one side of the quadrilateral at a vertex.
the same as a regular quadrilateral, 4
3
six
None. By definition a diagonal goes from one vertex to another vertex and so each diagonal MUST have two vertices.
8
A regular quadrilateral has 4 lines of symetry
As a trapezoid is a quadrilateral (four-sided) it has four vertices.
4
5 diagonals * * * * * That is not correct since two of these would be lines joining the vertex to adjacent vertices (one on either side). These are sides of the polygon, not diagonals. The number of diagonals from any vertex of a polygon with n sides is n-3.
3 ----------- Each vertex (corner) has a diagonal with each other vertex. Your best bet is to draw a septagon and count them (clue: it's less than 343 but more than 7)
the same as a regular quadrilateral, 4
2
3
3
13 The correct answer is 12. From any one vertex, you can draw a diagonal to all but 3 vertices: the vertex itself and the next vertex on either side of your vertex (these would be sides of your shape, not diagonals).