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Earn +20 ptsQ: Is a quadrilateral convex or concave?
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Does a quadrilateral have a convex or a concave angle?
concave
What is non convex quadrilateral?
A concave quadrilateral. An arrowhead or a delta, for example.
How can you tell whether a quadrilateral is convex or not convex?
If any of the angles is greater than 180 degrees, the quadrilateral is concave.
A square is an example of a quadrilateral that is both a regular concave polygon and a regular convex polygon?
No. There can be no regular concave polygon.
Is a concave quadrilateral less than 180 degrees?
The sum of the interior angles of a quadrilateral is 360 degrees (not 180). The sum of the exterior angles is also 360 degrees. Whether the quadrilateral is convex or concave is not relevant.
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