It is convex because you can draw a straight line between any two points on it without having to take your pen off of the sign.
concave
It can be convex or concave.
A rhombus is an equilateral parallelogram. As such, it is neither concave nor convex.
Rectangle
convex
concave
It can be convex or concave.
concave is inward, convex is outward concave is inward, convex is outward
convex and concave
The opposite of convex is concave. Concave shapes have an inward curve, while convex shapes have an outward curve.
The mold for a concave object is convex.The mold for a convex object is concave.
we polish concave and convex with alimunium
Concave
concave=in convex=out
convex
Convex ~
A rhombus is an equilateral parallelogram. As such, it is neither concave nor convex.