Q: What is an example of concave?

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Concave.

No. There can be no regular concave polygon.

A concave quadrilateral. An arrowhead or a delta, for example.

Concave, because you can connect the corners from the outside.

concave

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Yes. All polygons with 4 or more sides can be concave. An arrowhead is an example of a concave quadrilateral. The back of an envelop (where the sides are folded and glued together) is a concave pentagon.

rectangle and concave

Concave.

If an object is concave, it means that is contains a surface that curves inward. Eyeglass lenses and bowls, for example, can both be said to be concave.

A nonconvex polygon is a concave polygon. All polygons with 4 or more sides can be concave. An arrowhead is an example of a concave quadrilateral. The back of an envelop (where the sides are folded and glued together) is a concave pentagon.

it is a concave {penn foster}

b....concave b....concave

b....concave b....concave

No. There can be no regular concave polygon.

Lots of different things curve in. Something that curves inwards can also be called concave, a spoon is an example of something that is concave. A bowl is also concave and curves inward.

Concave means that there is a dip in the object, like it has caved in. Bi-concave means that it is dipped in on two sides of the object. A good example is a red blood cell. It is a bi-concave disk - it has dips on two sides of it.

A concave quadrilateral. An arrowhead or a delta, for example.