An arrow can have both concave and convex surfaces, depending in its design.
Yes.
Reflex angle
no concave mirror is in shape of concave mirror
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.
It depends on they type of arrowhead you have. If it is a arrowhead in the shape of a directional arrow, there are no obtuse angles. The most possible obtuse angles is 1.
It is also called an arrowhead or chevron. It is the shape that you will get if you take a kite and push its apex down until it becomes concave.
Yes.
An arrowhead is also called a delta. It is a concave quadrilateral with one axis of symmetry.
A chevron or arrowhead.
Reflex angle
A concave quadrilateral - like an arrowhead or chevron.
A concave quadrilateral would be a non-convex quadrilateral. * * * * * Also known as delta or arrowhead or chevron.
If it is symmetric then it looks like an arrowhead.
A concave quadrilateral. An arrowhead or a delta, for example.
no concave mirror is in shape of concave mirror
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.
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.