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Anonymous
It is a plane area enclosed by four sides, such that each interior angles is less than 180 degrees.
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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.
how many sides convex quadilaterals have
Yes, such a quadrilateral could be shaped like an arrow head - (a large V capping a smaller v).
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.