yes if it was dome shaped
It could have four if it is concave.
windows if u have a old camera or binoculars,u could open them up and get the concave and convex lenses from there.
The opposite of convex is concave. Concave shapes have an inward curve, while convex shapes have an outward curve.
An octagon is an eight-sided two-dimensional object. If each of the eight sides to an octagon were concave, it would still be an octagon. So, yes, it could.
Concave, because you can connect the corners from the outside.
Concave is a property of [irregular] polygons. A parallelogram cannot be concave.
plano concave
no concave mirror is in shape of concave mirror
concave=in convex=out
concave lenses are prescribed by doctors
concave
His glasses have a concave lens.