Such a mirror is concave.
convex
A mirror that is curved outward is convex. A mirror that is curved inward is concave.
A "concave" mirror curves inward. A "convex" mirror curves outward.
convex
concave and convex refer to the curve of the mirror. if it is concave, it curves in at the middle, like a 'cave'. if it is convex, it curves out at the middle, like an eye. think of a spoon - one side is convex, the other is concave. this curve will affect the image the mirror shows.
The wing mirror or side mirror of a car is convex. It curves out to be able to see with a wider angle.
It curves out ward D <---
Convex Mirror
The convex mirror curves outwards while the concave mirror would curve inwards. The convex mirror traces light out making faraway objects bigger like in a telescope.
If our image is real and inverted and smaller than the object ,then it is a concave mirror; if the image is virtual and erect and larger than the object,then it is a convex mirror; if the image is of the same size as of the object,it is a plane mirror. that is how we can distinguish or identify which of the given mirrors are what. BUT if the angle is very small you cannot tell Plane is flat, convex it curves outwards and concave it curves inwards.
This gives the driver a wider field of vision. Usually only the passenger side mirror is convex. The reflective surface of a convex mirror curves outward like the outer surface of a ball or globe. An object observed by looking at its reflection in a convex mirror appears to be smaller than actual size.