Well, depending on how you want it, either a convex, reflex, or regularhendecagon , or a eleven-gon. I think this is how they look like though.
Convex lens curve outwards.
In a convex figure, if you pick any two points, the points between them are also a part of the figure.
A convex lens curves outward, forming an elliptical shape.
Convex lens always gives a virtual & diminished image.
It curves out ward D <---
yes
A non convex polygon would have an exterior angle less than 90 degrees making it look concave at that vertex.
convex
When you look through a convex lens the image appears to be larger
figure A
It is convex if you look at it from the inside but it is not any kind of polygon.