## What is difference of convex and concave?

Concave means “hollowed out or rounded inward” and is easily remembered because these surfaces “cave” in. The opposite is convex meaning “curved or rounded outward.” Both words have been around for centuries but are often mixed up. Advice in mirror may be closer than it appears.

## What is convex and concave function?

A function of a single variable is concave if every line segment joining two points on its graph does not lie above the graph at any point. Symmetrically, a function of a single variable is convex if every line segment joining two points on its graph does not lie below the graph at any point.

**Is concave positive or negative?**

A concave lens is a diverging lens, so it will always have a negative focal length. Therefore, the power of a concave lens is also negative.

### Is concave down negative?

In order to find what concavity it is changing from and to, you plug in numbers on either side of the inflection point. if the result is negative, the graph is concave down and if it is positive the graph is concave up.

### What does convex mean in math?

Convex, meaning “curving out” or “extending outward” (compare concave), may refer to: Convex Computer , a company that produced a number of vector supercomputers. Convex function, in mathematics. Convex lens, in optics. Convex polygon, a polygon in which no line segment between two points on the boundary ever goes outside the polygon.

**Which side is convex?**

In geometry, a convex curve is a simple curve in the Euclidean plane which lies completely on one side of each and every one of its tangent lines. The boundary of a convex set is always a convex curve.

#### What is an example of a convex shape?

The definition of convex is curving outwards like the edge of a circle. An example of convex is the shape of the lens in eyeglasses.

#### What are concave shapes?

concave shape – a shape that curves or bends inward. concavity, incurvation, incurvature. solid – a three-dimensional shape. dome – a concave shape whose distinguishing characteristic is that the concavity faces downward.