A geometric star shape is concave. A star that is in the sky is convex.
Concave, because you can connect the corners from the outside.
concave
A concave line is a line that caves in.
No, you would need at least 4 points to create a concave polygon.
A geometric star shape is concave. A star that is in the sky is convex.
pole is the geometric center of the reflecting surface.
concave
The opposite of convex is concave. Concave shapes have an inward curve, while convex shapes have an outward curve.
Concave is a property of [irregular] polygons. A parallelogram cannot be concave.
plano concave
no concave mirror is in shape of concave mirror
Concave, because you can connect the corners from the outside.
concave=in convex=out
Concave
There are some meaning on the term " concave up". However, in most cases, a concave is a hallow curve. A half circle with an opening is also a concave. Concave up means to concave somethings.
Rectangle