A quadrilateral has 2 diagonals. It does not matter whether it is convex or not.
What is the sum of the measures of the angles of a convex quadrilateralwill this property hold if the quadrilateral is not convex?
no
If any of the angles is greater than 180 degrees, the quadrilateral is concave.
Yes, such a quadrilateral could be shaped like an arrow head - (a large V capping a smaller v).
how many sides convex quadilaterals have
yes
It may or may not be.
A concave quadrilateral. An arrowhead or a delta, for example.
concave
A concave quadrilateral would be a non-convex quadrilateral. * * * * * Also known as delta or arrowhead or chevron.
It would be a concave quadrilateral The link below has some pics.