Question

definition of convex and concave with figure​

Answer 1

Concave describes shapes that curve inward, like an hourglass. 

Convex describes shapes that curve outward, like a football (or a rugby ball).

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Answer 2

Answer:

A convex shape is the opposite of a concave shape. It curves outward, and its middle is thicker than its edges. ... Just like concave, convex can be used as a noun for a surface or line that curves outward, and it also has a use in geometry, where it describes a polygon with interior angles less than or equal to 180°.

Concave describes shapes that curve inward. The inside part of a bowl is a concave shape.A concave is a surface or a line that is curved inward. In geometry, it is a polygon with at least one interior angle greater than 180°.