A rhombus is an equilateral parallelogram. As such, it is neither concave nor convex.
It can be convex or concave.
Rectangle
convex
Is a concave polygon.
A rhombus is an equilateral parallelogram. As such, it is neither concave nor convex.
The opposite of convex is concave. Concave shapes have an inward curve, while convex shapes have an outward curve.
It can be convex or concave.
convex and concave
Lenses: converging (convex) and diverging (concave) Mirrors: concave and convex
concave=in convex=out
convex
The Rear view mirrors are convex The Headlights are concave
Rectangle
concave
concave
concave