# Convex - Concave polygons, functions

## Polygons

**CONVEX POLYGON**- the segment connecting any two interior points runs inside the polygon**CONCAVE POLYGON**- there are at least two points whose connecting segment goes outside the polygon

## Functions

**CONVEX FUNCTION**- a function is convex if its tangent passes everywhere under the curve of the function**CONCAVE FUNCTION**- a function is concave if its tangent passes everywhere above the curve of the function

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